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The Sloan Digital Sky Survey Reverberation Mapping Project: Improving Lag Detection with an Extended Multiyear Baseline. We investigate the effects of extended multiyear light curves (9 yr photometry and 5 yr spectroscopy) on the detection of time lags between the continuum variability and broad-line response of quasar... | [
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A Super-Earth and Sub-Neptune Transiting the Late-type M Dwarf LP 791-18. Planets occur most frequently around cool dwarfs, but only a handful of specific examples are known to orbit the latest-type M stars. Using TESS photometry, we report the discovery of two planets transiting the low-mass star called LP 791-18 (ide... | [
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Energy Balance in Avalanche Models for Solar Flares. The distributions of solar flare energies and waiting times have not been described simultaneously by a single physical model, yet. In this research, we investigate whether recent avalanche models can describe the distributions for both the released energies and wait... | [
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The Changing Rotational Light-curve Amplitude of Varuna and Evidence for a Close-in Satellite. From CCD observations carried out with different telescopes, we present short-term photometric measurements of the large trans-Neptunian object Varuna in 10 epochs, spanning around 19 years. We observe that the amplitude of t... | [
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Effects of Anisotropic Viscosity on the Evolution of Active Galactic Nuclei Bubbles in Galaxy Clusters. The interaction between jets from active galactic nuclei (AGNs) and the intracluster medium (ICM) provides key constraints on the feeding and feedback of supermassive black holes. Much understanding about AGN feedbac... | [
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The Impact of Metallicity Evolution of the Universe on the Maximum Mass of LIGO Binary Black Holes. We can be biased against observing massive black holes (BHs) merging in the local universe as the bounds on the maximum BH mass ({M}BH}\max ) depends on the assumptions regarding the metallicity evolution of the star-for... | [
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29P/Schwassmann-Wachmann 1, A Centaur in the Gateway to the Jupiter-family Comets. Jupiter-family comets (JFCs) are the evolutionary products of trans-Neptunian objects (TNOs) that evolve through the giant planet region as Centaurs and into the inner solar system. Through numerical orbital evolution calculations follow... | [
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Merger Rate of Stellar Black Hole Binaries above the Pair-instability Mass Gap. In current stellar evolutionary models, the occurrence of pair-instability supernovae implies a lack of stellar black holes (BHs) with masses between about [60, 120] M⊙, resulting in the presence of an upper-mass gap in the BH mass distribu... | [
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Disintegrating Inbound Long-period Comet C/2019 J2. We present observations of the disintegrating long-period comet C/2019 J2 (Palomar), taken to determine the nature of the object and the cause of its demise. The data are consistent with the break-up of a sub-kilometer nucleus into a debris cloud of mass ∼109 kg, peak... | [
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Spectropolarimetry of the Solar Mg II h and k Lines. We report on spectropolarimetric observations across the Mg II h and k lines at 2800 Å made by the Ultraviolet Spectrometer and Polarimeter on board the Solar Maximum Mission satellite. Our analysis confirms the strong linear polarization in the wings of both lines o... | [
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Radial Dependence of the Proto-globular Cluster Contribution to the Milky Way Formation. Recent interpretation of the color-magnitude diagrams of the Milky Way (MW) bulge has suggested that the observed double red-clump feature can be a natural consequence of He-enhanced stellar populations in the MW bulge. This implie... | [
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Dragonfly Imaging of the Galaxy NGC 5907: A Different View of the Iconic Stellar Stream. In 2008 it was reported that the stellar stream of the edge-on spiral NGC 5907 loops twice around the galaxy, enveloping it in a giant corkscrew-like structure. Here we present imaging of this iconic object with the Dragonfly Telep... | [
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Off the Baryonic Tully-Fisher Relation: A Population of Baryon-dominated Ultra-diffuse Galaxies. We study the gas kinematics traced by the 21 cm emission of a sample of six H I-rich low surface brightness galaxies classified as ultra-diffuse galaxies (UDGs). Using the 3D kinematic modeling code 3DBarolo we derive robus... | [
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Discovery of a Red Supergiant Donor Star in SN2010da/NGC 300 ULX-1. SN2010da/NGC 300 ULX-1 was first detected as a supernova impostor in 2010 May and was recently discovered to be a pulsating ultraluminous X-ray source. In this Letter, we present Very Large Telescope/X-shooter spectra of this source obtained in 2018 Oc... | [
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Precursor Wave Amplification by Ion-Electron Coupling through Wakefield in Relativistic Shocks. We investigated electromagnetic precursor wave emission in relativistic shocks by using two-dimensional particle-in-cell simulations. We found that the wave amplitude is significantly enhanced by a positive feedback process ... | [
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Revisiting the Strongest Martian X-Ray Halo Observed by XMM-Newton on 2003 November 19-21. On 2003 November 20-21, when the most intense geomagnetic storm during solar cycle 23 was observed at Earth, XMM-Newton recorded the strongest Martian X-ray halo hitherto. The strongest Martian X-ray halo has been suggested to be... | [
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The Observability of Vortex-driven Spiral Arms in Protoplanetary Disks: Basic Spiral Properties. Some circumstellar disks are observed to show prominent spiral arms in infrared scattered light or (sub-)millimeter dust continuum. The spirals might be formed from self-gravity, shadows, or planet-disk interactions. Recent... | [
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The Habitability of GJ 357D: Possible Climate and Observability. The GJ 357 system harbors three planets orbiting a bright, nearby M2.5V star at 9.44 pc. The innermost planet, GJ 357b (TOI-562.01), is a hot transiting Earth-sized planet with Earth-like density, which receives about 12 times the irradiation Earth receiv... | [
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A Future Percent-level Measurement of the Hubble Expansion at Redshift 0.8 with Advanced LIGO. Simultaneous measurements of distance and redshift can be used to constrain the expansion history of the universe and associated cosmological parameters. Merging binary black hole (BBH) systems are standard sirens—their gravi... | [
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Discovery of an Mg II Changing-look Active Galactic Nucleus and Its Implications for a Unification Sequence of Changing-look Active Galactic Nuclei. Changing look (CL) is a rare phenomenon of active galactic nuclei (AGNs) that exhibit emerging or disappearing broad lines accompanied by continuum variations on astrophys... | [
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The Complete Evolution of a Neutron-star Binary through a Common Envelope Phase Using 1D Hydrodynamic Simulations. Over 40 years of research suggests that the common envelope phase, in which an evolved star engulfs its companion upon expansion, is the critical evolutionary stage forming short-period, compact-object bin... | [
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Runaway Young Stars near the Orion Nebula. The star-forming region of the Orion Nebula (ONC) is ideal to study the stellar dynamics of young stars in a clustered environment. Using Gaia DR2 we search for pre-main sequence stars with unusually high proper motions that may be representative of a dynamical ejection from u... | [
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Subkiloparsec Imaging of Lyα Emission in a Low-mass, Highly Ionized, Gravitationally Lensed Galaxy at z = 1.84. Low-mass, low-metallicity galaxies at low to moderate (z ≲ 3) redshifts offer the best opportunity for detailed examination of the interplay between massive stars, ionizing radiation and gas in sources simila... | [
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Exploring the Mid-infrared SEDs of Six AGN Dusty Torus Models. I. Synthetic Spectra. At distances from the active galaxy nucleus where the ambient temperature falls below ∼1500-1800 K, dust is able to survive. It is thus possible to have a large dusty structure present that surrounds the active galaxy nucleus. This is ... | [
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Exploring the Mid-infrared SEDs of Six AGN Dusty Torus Models. II. The Data. This is the second in a series of papers devoted to exploring a set of six dusty models of active galactic nuclei (AGN) with available spectral energy distributions. These models are the smooth torus by Fritz et al., the clumpy torus by Nenkov... | [
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A Fresh Look at Narrow-angle Tail Radio Galaxy Dynamics, Evolution, and Emissions. We present a 3D magnetohydrodynamic study of narrow-angle tail (NAT) radio galaxy (RG) dynamics, including passive cosmic ray electrons. We follow the evolution of a bipolar-jet RG in a persistent crosswind through hundreds of Myr. We co... | [
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Curvature-induced Polarization and Spectral Index Behavior for PKS 1502+106. A comprehensive study of multifrequency correlations can shed light on the nature of variation for blazars. In this work, we collect the long-term radio, optical, and γ-ray light curves of PKS 1502+106. After performing the localized cross-cor... | [
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Can an Unobserved Concentration of Magnetic Flux Above the Poles of the Sun Resolve the Open Flux Problem?. Global models of the extended solar corona, driven by observed photospheric magnetic fields, generally cannot reproduce the amplitude of the measured interplanetary magnetic field at 1 au (or elsewhere in the hel... | [
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Multiwavelength Period-Luminosity and Period-Luminosity-Color Relations at Maximum Light for Mira Variables in the Magellanic Clouds. We present Period-Luminosity and Period-Luminosity-Color relations at maximum light for Mira variables in the Magellanic Clouds using time-series data from the Optical Gravitational Lens... | [
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Analysis of the Spatially Resolved V-3.6 μm Colors and Dust Extinction in 257 Nearby NGC and IC Galaxies. We present and analyze spatially resolved maps for the observed V- and g-band to 3.6 μm flux ratios and the inferred dust-extinction values, A V , for a sample of 257 nearby NGC and IC galaxies. Flux ratio maps ar... | [
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Solar Active Region Heating Diagnostics from High-temperature Emission Using the MaGIXS. The relative amount of high-temperature plasma has been found to be a useful diagnostic to determine the frequency of coronal heating on sub-resolution structures. When the loops are infrequently heated, a broad emission measure (E... | [
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Revisiting the Spectral and Timing Properties of NGC 4151. NGC 4151 is the brightest Seyfert 1 nucleus in X-rays. It was the first object to show short time delays in the Fe K band, which were attributed to relativistic reverberation, providing a new tool for probing regions at the black hole scale. Here we report the ... | [
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Neutrino-driven Instability of Ion Acoustic Waves in an Ultrarelativistic Degenerate Plasma. The coupling between ion acoustic waves (IAWs) and a neutrino beam undergoing flavor oscillations in a dense, relativistically degenerate plasma is analyzed. The neutrino-driven streaming instability of the IAWs is investigated... | [
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Using X-Ray Morphological Parameters to Strengthen Galaxy Cluster Mass Estimates via Machine Learning. We present a machine-learning approach for estimating galaxy cluster masses, trained using both Chandra and eROSITA mock X-ray observations of 2041 clusters from the Magneticum simulations. We train a random forest (R... | [
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Supermassive Black Hole Binary Candidates from the Pan-STARRS1 Medium Deep Survey. We present a systematic search for periodically varying quasar and supermassive black hole binary (SMBHB) candidates in the Pan-STARRS1 Medium Deep Survey (MDS). From ∼9000 color-selected quasars in an ∼50 °2 sky area, we initially ident... | [
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On Kinetic Instabilities Driven By Ion Temperature Anisotropy and Differential Flow in the Solar Wind. The ion temperature anisotropy instability is widely thought of as a constraint on the distribution of the ion perpendicular and parallel temperatures in the solar wind. Besides the ion temperature anisotropy, proton ... | [
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Cooling+Heating Flows in Galaxy Clusters: Turbulent Heating, Spectral Modeling, and Cooling Efficiency. The discrepancy between expected and observed cooling rates of X-ray emitting gas has led to the cooling-flow problem at the cores of clusters of galaxies. A variety of models have been proposed to model the observed... | [
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A Survey of Magnetic Field Strengths in the Envelopes of Molecular Clouds via the 18 cm OH Zeeman Effect. We present the results of an extensive Arecibo observational survey of magnetic field strengths in the inter-core regions of molecular clouds to determine their role in the evolution and collapse of molecular cloud... | [
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The Mass Inflow and Outflow Rates of the Milky Way. We present new calculations of the mass inflow and outflow rates around the Milky Way (MW), derived from a catalog of ultraviolet metal-line high-velocity clouds (HVCs). These calculations are conducted by transforming the HVC velocities into the Galactic standard of ... | [
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Intermediate Luminosity Optical Transients (ILOTs) from Merging Giants. We suggest and study the formation of intermediate luminosity optical transients (ILOTs) from the merger of two cool giant stars. For the two stars to merge when both are in their giant phases, they must have close masses at their zero-age main seq... | [
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Inductive Acceleration of Ions in Poynting-flux-dominated Outflows. Two-fluid (electron-positron) plasma modeling has shown that inductive acceleration can convert Poynting flux directly into bulk kinetic energy in the relativistic flows driven by rotating magnetized neutron stars and black holes. Here, we generalize t... | [
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Radio Spectroscopic Imaging of a Solar Flare Termination Shock: Split-band Feature as Evidence for Shock Compression. Solar flare termination shocks have been suggested as one of the promising drivers for particle acceleration in solar flares, yet observational evidence remains rare. By utilizing radio dynamic spectros... | [
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Entropy Rain: Dilution and Compression of Thermals in Stratified Domains. Large-scale convective flows called giant cells were once thought to transport the Sun’s luminosity in the solar convection zone, but recent observations have called their existence into question. In place of large-scale flows, some authors have ... | [
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A Study of Pre-flare Solar Coronal Magnetic Fields: Magnetic Flux Ropes. Magnetic flux ropes (MFRs) are thought to be the central structures of solar eruptions, and their ideal MHD instabilities can trigger the eruption. Here we performed a study of all the MFR configurations that lead to major solar flares, either eru... | [
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Damping Mechanisms of the Solar Filament Longitudinal Oscillations in the Weak Magnetic Field. Longitudinal oscillations of the solar filament have been investigated via numerical simulations continuously, but mainly in one dimension, where the magnetic field line is treated as a rigid flux tube. Whereas those one-dime... | [
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The Distribution of Dense Cores near H II Regions. An investigation of dust emission associated with a large sample of H II regions has been carried out. Stacked results from this sample suggest that each H II region is at or near the center of a cluster of dense cores that extends far beyond the H II region, and has a... | [
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Supernova Shocks in Molecular Clouds: Velocity Distribution of Molecular Hydrogen. Supernovae from core collapse of massive stars drive shocks into the molecular clouds from which the stars formed. Such shocks affect future star formation from the molecular clouds, and the fast-moving, dense gas with compressed magneti... | [
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Type IIn Supernova Light Curves Powered by Forward and Reverse Shocks. We present a bolometric light-curve model of Type IIn supernovae powered by supernova ejecta colliding with a circumstellar medium. We estimate the conversion efficiency of the ejecta’s kinetic energy to radiation at the reverse and forward shocks a... | [
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Regime Transition between Eddy-driven and Moist-driven Circulation on High Obliquity Planets. We investigate how the meridional circulation and baroclinic eddies change with insolation and rotation rate, under high and zero-obliquity setups, using a general circulation model. The total circulation is considered as supe... | [
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Opposite Polarity Magnetic Fields and Convective Downflows in a Simulated Sunspot Penumbra. Recent numerical simulations and observations of sunspots show a significant amount of opposite polarity magnetic fields within the sunspot penumbra. Most of the opposite polarity fields are associated with convective downflows.... | [
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Serendipitous Discovery of PSR J1431-6328 as a Highly Polarized Point Source with the Australian SKA Pathfinder. We identified a highly polarized, steep-spectrum radio source in a deep image with the Australian Square Kilometre Array Pathfinder (ASKAP) telescope at 888 MHz. After considering and rejecting a stellar ori... | [
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The Inside-out Growth of the Galactic Disk. We quantify the inside-out growth of the Milky Way’s low-α stellar disk, modeling the ages, metallicities, and Galactocentric radii of APOGEE red clump stars with 6 kpc < R < 13 kpc. The current stellar distribution differs significantly from that expected from the star... | [
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Medium-band Photometry Reverberation Mapping of Nearby Active Galactic Nuclei. Reverberation mapping (RM) is one of the most efficient ways to investigate the broad-line region around the central supermassive black holes of active galactic nuclei (AGNs). A common way of performing the RM is to perform a long term spect... | [
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Mitigating Internal Instrument Coupling for 21 cm Cosmology. I. Temporal and Spectral Modeling in Simulations. We study the behavior of internal signal chain reflections and antenna cross coupling as systematics for 21 cm cosmological surveys. We outline the mathematics for how these systematics appear in interferometr... | [
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A NICER Look at Strong X-Ray Obscuration in the Seyfert-2 Galaxy NGC 4388. We present an analysis of the time-averaged spectrum of the Seyfert-2 active galaxy NGC 4388, obtained by NICER. The intrinsic strength of the reflection spectrum in NGC 4388, the large collecting area and favorable passband of NICER, and a net ... | [
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New Millimeter CO Observations of the Gas-rich Debris Disks 49 Cet and HD 32297. Previous observations revealed the existence of CO gas at nearly protoplanetary level in several dust-rich debris disks around young A-type stars. Here we used the Atacama Large Millimeter/submillimeter Array (ALMA) 7 m Array to measure 13... | [
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An ALMA/HST Study of Millimeter Dust Emission and Star Clusters. We present results from a joint ALMA/HST study of the nearby spiral galaxy NGC 628. We combine the Hubble Space Telescope (HST) Legacy ExtraGalactic UV Survey (LEGUS) database of over 1000 stellar clusters in NGC 628 with ALMA Cycle 4 mm/submillimeter obs... | [
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Hubble Space Telescope Spectroscopy of a Planetary Nebula in an M31 Open Cluster: Hot-bottom Burning at 3.4 M <SUB>⊙</SUB>. We use imaging and spectroscopy from the Hubble Space Telescope (HST) to examine the properties of a bright planetary nebula (PN) projected within M31's young open cluster B477-D075. We show that ... | [
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Formation of Power-law Electron Energy Spectra in Three-dimensional Low-β Magnetic Reconnection. While observations have suggested that power-law electron energy spectra are a common outcome of strong energy release during magnetic reconnection, e.g., in solar flares, kinetic simulations have not been able to provide d... | [
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A Reverse Shock in GRB 181201A. We present comprehensive multiwavelength radio to X-ray observations of GRB 181201A spanning from ≈150 s to ≈163 days after the burst, comprising the first joint ALMA-VLA-GMRT observations of a gamma-ray burst (GRB) afterglow. The radio and millimeter-band data reveal a distinct signatur... | [
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Anisotropic Radio-wave Scattering and the Interpretation of Solar Radio Emission Observations. The observed properties (i.e., source size, source position, time duration, and decay time) of solar radio emission produced through plasma processes near the local plasma frequency, and hence the interpretation of solar radi... | [
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Reanalysis of the Pulsar Scenario to Explain the Cosmic Positron Excess Considering the Recent Developments. The slow diffusion of cosmic rays could be common around pulsars as indicated by the recent observations of HAWC, which can significantly change the pulsar interpretation of the well-known positron excess. Meanw... | [
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X-Ray Intraday Variability of the TeV Blazar Mrk 421 with Suzaku. We present X-ray flux and spectral analyses of the three pointed Suzaku observations of the TeV high synchrotron peak blazar Mrk 421 taken throughout its complete operational duration. The observation taken on 2008 May 5 is, at 364.6 ks (i.e., 101.3 hr),... | [
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The Recent Burstiness of Star Formation in Galaxies at z ∼ 4.5 from Hα Measurements. The redshift range z = 4-6 marks a transition phase between primordial and mature galaxy formation in which galaxies considerably increase their stellar mass, metallicity, and dust content. The study of galaxies in this redshift range ... | [
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Variable Hard X-Ray Emission from the Central Star of the Eskimo Nebula. The central star of NGC 2392 shows the hardest X-ray emission among central stars of planetary nebulae (CSPNe). The recent discovery of a spectroscopic companion with an orbital period of 1.9 days could provide an explanation for its hard X-ray em... | [
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An Assessment of Contamination in the Thermal-SZ Map Using Cross-correlations. We search for potential galactic and extragalactic dust contamination in thermal Sunyaev-Zeldovich maps derived from the Planck data. To test for contamination, we apply a variety of galactic dust and cosmic infrared background (CIB) models ... | [
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The Slowly Varying Corona. II. The Components of F <SUB>10.7</SUB> and Their Use in EUV Proxies. Using four years of full-disk-integrated coronal differential emission measures calculated in Schonfeld et al. (2017), we investigate the relative contribution of bremsstrahlung and gyroresonance emission in observations of... | [
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Escape of Flare-accelerated Particles in Solar Eruptive Events. Impulsive solar energetic particle events are widely believed to be due to the prompt escape into the interplanetary medium of flare-accelerated particles produced by solar eruptive events. According to the standard model for such events, however, particle... | [
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Pulsar Wind-heated Accretion Disk and the Origin of Modes in Transitional Millisecond Pulsar PSR J1023+0038. Transitional millisecond pulsars provide a unique set of observational data for understanding accretion at low rates onto magnetized neutron stars. In particular, PSR J1023+0038 exhibits a remarkable bimodality ... | [
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Termination Shock Measured by Voyagers and IBEX. Our heliosphere’s innermost boundary—the termination shock—slows and heats the supersonic solar wind and energizes anomalous cosmic rays (ACRs). We show that in addition to their termination shock crossings, the Voyager 1 and 2 spacecraft measurements identify additional... | [
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An ALMA Study of the FU Ori-type Object V900 Mon: Implications for the Progenitor. We present ALMA observations of 12CO, 13CO, and C18O J = 2-1 lines and the 230 GHz continuum for the FU Ori-type object (FUor) V900 Mon (d ∼ 1.5 kpc), for which the accretion burst was triggered between 1953 and 2009. We identified CO em... | [
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Tests of the Kerr Hypothesis with GRS 1915+105 Using Different RELXILL Flavors. In a previous paper, we tried to test the Kerr nature of the stellar-mass black hole in GRS 1915+105 by analyzing NuSTAR data of 2012 with our reflection model RELXILL_NK. We found that the choice of the intensity profile of the reflection ... | [
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No Sign of G2's Encounter Affecting Sgr A*'s X-Ray Flaring Rate from Chandra Observations. An unusual object, G2, had its pericenter passage around Sgr A*, the 4 × 106 M ⊙ supermassive black hole in the Galactic Center, in Summer 2014. Several research teams have reported evidence that, following G2's pericenter encoun... | [
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Chronology of Episodic Accretion in Protostars—An ALMA Survey of the CO and H<SUB>2</SUB>O Snowlines. Episodic accretion has been used to explain the wide range of protostellar luminosities, but its origin and influence on the star-forming process are not yet fully understood. We present an ALMA survey of N2H+ (1-0) an... | [
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The NLTE Analyses of Carbon Emission Lines in the Atmospheres of O- and B-type Stars. We present a model atom for C I-C II-C III-C IV using the most up-to-date atomic data and evaluated the non-local thermodynamic equilibrium line formation in classical 1D atmospheric models of O-B-type stars. Our models predict the em... | [
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"http://astrothesaurus.org/uat/1237",
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"http://astrothesaurus.org/uat/2072",
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Probing the Environment of High-z Quasars Using the Proximity Effect in Projected Quasar Pairs. We have used spectra of 181 projected quasar pairs at separations ≤1.5‧ from the Sloan Digital Sky Survey Data Release 12 in the redshift range of 2.5-3.5 to probe the proximity regions of the foreground quasars. We study th... | [
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Asymptotic Giant Branch Stars in the Nearby Dwarf Galaxy Leo P. We have conducted a highly sensitive census of the evolved-star population in the metal-poor dwarf galaxy Leo P and detected four asymptotic giant branch (AGB) star candidates. Leo P is one of the best examples of a nearby analog of high-redshift galaxies ... | [
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Radiative Association of Atomic and Ionic Carbon. We present calculated cross sections and rate coefficients for the formation of the dicarbon cation ({{{C}}}2+) by the radiative association process in collisions of a {{C}}{(}3P) atom and a {{{C}}}+{(}2{P}o) ion. Molecular structure calculations for a number of low-lyi... | [
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SDSS-IV MaNGA: Evidence for Enriched Accretion onto Satellite Galaxies in Dense Environments. We investigate the environmental dependence of the local gas-phase metallicity in a sample of star-forming galaxies from the MaNGA survey. Satellite galaxies with stellar masses in the range 9< {log}({M}* /{M}⊙ )< 10 are... | [
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A Statistical Study of Solar Filament Eruptions that Form High-speed Coronal Mass Ejections. Coronal mass ejections (CMEs) play a decisive role in driving space weather, especially the fast ones (e.g., with speeds above 800 km s-1). Understanding the trigger mechanisms of fast CMEs can help us gain important informatio... | [
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Flaring Activity of Proxima Centauri from TESS Observations: Quasiperiodic Oscillations during Flare Decay and Inferences on the Habitability of Proxima b. We analyze the light curve of the M5.5 dwarf Proxima Centauri obtained by the Transiting Exoplanet Survey Satellite (TESS) in Sectors 11 and 12. In the ≈50 day long... | [
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HaloSat: A CubeSat to Study the Hot Galactic Halo. HaloSat is a small satellite (CubeSat) designed to map soft X-ray oxygen line emission across the sky in order to constrain the mass and spatial distribution of hot gas in the Milky Way. The goal of HaloSat is to help determine if hot gas gravitationally bound to indiv... | [
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The Soft X-Ray Counterpart of Hanny’s Voorwerp Near IC 2497. We report the detection in Chandra Advanced CCD Imaging Spectrometer archival data of an elongated soft (<3 keV) X-ray feature to the south of the Compton-thick active galactic nucleus (AGN) galaxy IC 2497, coincident with the emission-line feature known a... | [
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Discovery and Identification of MAXI J1621-501 as a Type I X-Ray Burster with a Super-orbital Period. MAXI J1621-501 is the first Swift/XRT Deep Galactic Plane Survey transient that was followed up with a multitude of space missions (NuSTAR, Swift, Chandra, NICER, INTEGRAL, and MAXI) and ground-based observatories (Gem... | [
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The X-Ray Halo Scaling Relations of Supermassive Black Holes. We carry out a comprehensive Bayesian correlation analysis between hot halos and direct masses of supermassive black holes (SMBHs), by retrieving the X-ray plasma properties (temperature, luminosity, density, pressure, and masses) over galactic to cluster sc... | [
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"http://astrothesaurus.org/uat/767",
"http://astrothesaurus.org/uat/847",
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A VLA Polarimetric Study of the Galactic Center Radio Arc: Characterizing Polarization, Rotation Measure, and Magnetic Field Properties. The Radio Arc is one of the brightest systems of nonthermal filaments (NTFs) in the Galactic Center, located near several prominent H II regions (Sickle and Pistol) and the Quintuplet... | [
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Redefining the Torus: A Unifying View of AGNs in the Infrared and Submillimeter. The advent of high-angular-resolution IR and submillimeter interferometry allows for spatially resolved observations of the parsec-scale environment of active galactic nuclei (AGNs), commonly referred to as the “torus.” While molecular lin... | [
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Gas and Dust Temperature in Prestellar Cores Revisited: New Limits on Cosmic-Ray Ionization Rate. We develop a self-consistent model for the equilibrium gas temperature and size-dependent dust temperature in cold, dense, prestellar cores, assuming an arbitrary power-law size distribution of dust grains. Compact analyti... | [
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Predicting the Observational Signature of Migrating Neptune-sized Planets in Low-viscosity Disks. The migration of planetary cores embedded in a protoplanetary disk is an important mechanism within planet-formation theory, relevant for the architecture of planetary systems. Consequently, planet migration is actively di... | [
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Evolution of Coronal Mass Ejection Properties in the Inner Heliosphere: Prediction for the Solar Orbiter and Parker Solar Probe. The evolution of the magnetic field and plasma quantities inside a coronal mass ejection (CME) with distance are known from statistical studies using data from 1 au monitors, planetary missio... | [
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The Magnetic Flux Rope Structure of a Triangulated Solar Filament. Solar magnetic flux ropes are core structures driving solar activities. We construct a magnetic flux rope for a filament/prominence observed at 01:11 UT on 2011 June 21 in AR 11236 with a combination of state-of-the-art methods, including triangulation ... | [
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"http://astrothesaurus.org/uat/1503",
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Energy Budgets for Terrestrial Extrasolar Planets. The pathways through which incoming energy is distributed between the surface and atmosphere have been analyzed for the Earth. However, the effect of the spectral energy distribution of a host star on the energy budget of an orbiting planet may be significant given the... | [
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"http://astrothesaurus.org/uat/2053",
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A Wind-disk Self-irradiation Model for Supercritical Accretion. Optical emission from actively accreting X-ray binaries is dominated by X-ray reprocessing on the outer disk. In the regime of supercritical accretion, strong radiation will power a massive wind that is optically thick and nearly spherical, and will occult... | [
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Kelvin-Helmholtz Instability and Alfvénic Vortex Shedding in Solar Eruptions. We report on a three-dimensional MHD numerical experiment of a small-scale coronal mass ejection (CME)-like eruption propagating though a nonmagnetized solar atmosphere. We find that the Kelvin-Helmholtz instability (KHI) develops at various ... | [
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The DSHARP Rings: Evidence of Ongoing Planetesimal Formation?. Recent high-resolution interferometric observations of protoplanetary disks at (sub)millimeter wavelengths reveal omnipresent substructures, such as rings, spirals, and asymmetries. A detailed investigation of eight rings detected in five disks by the DSHAR... | [
"http://astrothesaurus.org/uat/638",
"http://astrothesaurus.org/uat/1241",
"http://astrothesaurus.org/uat/412",
"http://astrothesaurus.org/uat/1300",
"http://astrothesaurus.org/uat/1259",
"http://astrothesaurus.org/uat/236",
"http://astrothesaurus.org/uat/1857"
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"Planet formation",
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The Intrinsic Temperature and Radiative-Convective Boundary Depth in the Atmospheres of Hot Jupiters. In giant planet atmosphere modeling, the intrinsic temperature T int and radiative-convective boundary (RCB) are important lower boundary conditions. Often in one-dimensional radiative-convective models and in three-di... | [
"http://astrothesaurus.org/uat/495",
"http://astrothesaurus.org/uat/491",
"http://astrothesaurus.org/uat/509",
"http://astrothesaurus.org/uat/487"
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"Exoplanet evolution",
"Extrasolar gaseous giant planets",
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"http://astrothesaurus.org/uat/753",
"http://astrothesaurus.org/uat/873",
"http://astrothesaurus.org/uat/2309"
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A New Luminous Blue Variable in the Outskirts of the Andromeda Galaxy. The hot massive luminous blue variables (LBVs) represent an important evolutionary phase of massive stars. Here, we report the discovery of a new LBV—LAMOST J0037+4016 in the distant outskirt of the Andromeda galaxy. It is located in the southwester... | [
"http://astrothesaurus.org/uat/39",
"http://astrothesaurus.org/uat/944",
"http://astrothesaurus.org/uat/8"
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"Luminous blue variable stars",
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"http://astrothesaurus.org/uat/918",
"http://astrothesaurus.org/uat/941",
"http://astrothesaurus.org/uat/1164",
"http://astrothesaurus.org/uat/1559",
"http://astrothesaurus.org/uat/1724",
"http://astrothesaurus.org/uat/1914",
... | [
"B supergiant stars",
"Massive stars",
"Light curves",
"Luminosity classification",
"Optical bursts",
"Spiral arms",
"Two-color diagrams",
"Regression",
"Spectral energy distribution"
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Observed Local Dispersion Relations for Magnetoacoustic-gravity Waves in the Sun’s Atmosphere: Mapping the Acoustic Cutoff Frequency. We present the observed local dispersion relations for magnetoacoustic-gravity waves in the Sun’s atmosphere for different levels of magnetic field strength. We model these data with a t... | [
"http://astrothesaurus.org/uat/1515",
"http://astrothesaurus.org/uat/1477",
"http://astrothesaurus.org/uat/1503"
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"Solar atmosphere",
"Solar magnetic fields"
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"http://astrothesaurus.org/uat/1237",
"http://astrothesaurus.org/uat/1487",
"http://astrothesaurus.org/uat/1693",
"http://astrothesaurus.org/uat/1748"
] | [
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"Magnetic fields",
"Stellar photospheres",
"Solar cycle",
"The Sun",
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