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Morphology and Hydrological Context of the McCauley Crater Delta, Mars. McCauley crater hosts a well-preserved delta in a palaeolake northeast of the Hellas Basin on Mars. Its formation records hydrological activity possibly driven by episodic glacial meltwater input. Morphological analyses of image and topographic dat... | [
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Kinetic Temperature Rate Coefficients for Dissociative Recombination of CH<SUP>+</SUP>. The rate coefficient for dissociative recombination (DR) of CH+ is needed to model clouds in the interstellar medium (ISM). Theoretical data for DR are typically obtained in the form of cross sections as a function of collision ener... | [
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A UV Spectroscopic Analysis of VY Scl during the Deep Low State of 1983. We focus on the archival UV Spectra of VY Scl obtained by the IUE spacecraft during the 1983 deep low state of the system. Calculations and UV modeling of the accretion disk and white dwarf (WD) in VY Scl is presented. We find that the accretion d... | [
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Full-depth unWISE Coadds through the End of the NEOWISE Mission. We have combined Wide-field Infrared Survey Explorer (WISE) and NEOWISE science exposures spanning from 2010 January through 2024 July to create the deepest ever full-sky maps at 3.4 μm (W1) and 4.6 μm (W2). These maps, which we publicly release, are base... | [
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A High-amplitude Radial Velocity Variable in DESI DR1: Gaia DR3 3802130935635096832. I report a large-amplitude radial velocity (RV) variable, Gaia DR3 3802130935635096832, identified in the Dark Energy Spectroscopic Instrument (DESI) DR1 Milky Way Survey. The DESI catalog RVs span ∆RVmax≍146 km s−1 over 38.9 days. G... | [
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SPHEREx Reobservation of Interstellar Object 3I/ATLAS in 2025 December: Detection of Increased Post-perihelion Activity, Refractory Coma Dust, and New Coma Gas Species. In 2025 December, SPHEREx re-observed 3I/ATLAS post-perihelion, finding a much more active object compared to 2025 August SPHEREx pre-perihelion observ... | [
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Optically Thin Models and Radiative Transfer Models of AGB Stars. Asymptotic giant branch (AGB) stars are evolved stars that eject large amounts of dust. Here, we present emission models of circumstellar dust shells around two oxygen-rich AGB stars—RX Boo and HT Aqr—and one S star, Y Lyn. These models suggest that coru... | [
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TSSC Comet-centered Data Products from TESS 3I/ATLAS Observations. 3I/ATLAS is the third known interstellar object to pass through our solar system. NASA's Transiting Exoplanet Survey Satellite (TESS) made dedicated observations of 3I/ATLAS between 2026 January 15 and 22 (Sector 1751), capturing high-cadence observatio... | [
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Determination of the Abundance of Mercury from the Hg II Line at 5677.10 Å in Late B-type Stars. XXVIII. HD 19400 (θ Hyi). The weak line of Hg II located at 5677.10 Å is used to measure the mercury abundance in the late B-type star HD 19400 (θ Hyi). This line is detected at 3σ above the noise in the adjacent continuum.... | [
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Discovery of the Double-mode Pulsation of Variable Star GH Del. The variable star GH Del was classified by the Variable Star Index as an RR Lyrae type variable. The SSV-UAI-GRAV, variable stars section of the UAI (Italian Amateur Astronomers Union), undertook an observation campaign for the star GH Del in order to dete... | [
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Evidence that SOL2012-06-03 Late Phase γ Rays are Produced by >300 MeV Protons from CME-shock Acceleration of Suprathermals from the Flare. A recent paper on SOL2012-06-03 reported the detection for the first time of two distinct phases of >100 MeV γ-radiation indicating separate acceleration processes. But such ... | [
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Ballistic Mass Transfer Necessarily Contracts Orbits in Binary Star Systems. In mass-transferring binary star systems, classical theories show orbital expansion when q = Mdonor/Maccretor < 1. However, these predictions rely on angular momentum conservation. I show that a ballistic prescription, where transferred mas... | [
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The Correlation between Low and High Mass Star Formation: Comparing the Envelope Mass Infall Rate of Low and Intermediate Mass Protostars. Linking low and high-mass star formation is a key goal in star formation theory. Building on the shared framework of inside-out collapse and turbulent core models, forming high-mass... | [
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Hidden Companions to Intermediate-mass Stars. XXXV. Unveiling a 1.2M<SUB>⊙</SUB>, 0.38 au Companion to Iota Aquarii. Iota Aquarii is a nearby B-type star that has accrued a large amount of evidence for a close companion. Here we report on a VLTI/GRAVITY observation in which we detected a 1.2M⊙ companion at a projected ... | [
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JWST Spectra are Consistent with the Edge-on Star-forming Galaxy Scenario for the "Runaway Supermassive Black Hole". The linear structure reported by P. van Dokkum et al. has been proposed as either a massive stellar wake produced by a runaway supermassive black hole (SMBH) or a bulgeless edge-on galaxy. New JWST/NIRSp... | [
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The Late Spectrum of the Very Fast Fe II Nova V3661 Ophiuchi. V3661 Ophiuchi has the fastest rate of brightness decline of any Fe II type nova observed to date. Here we present its spectrum (from 0.47 to 2.5 μm) 130 days after visible maximum. The spectrum shows both very low and very high excitation permitted and forb... | [
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Theoretical Calculation of the Antenna Impedance and Shot Noise at Low Frequencies: Application to Parker Solar Probe. The voltage power spectral density measured around the ambient plasma frequency in space is not affected by spacecraft perturbations that impact traditional plasma analyzers. The spectroscopy of this n... | [
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Dynamical Constraints on Temporary Earth Capture of 2022 NX1. Near-Earth objects that are temporarily captured by Earth represent dynamically fragile events that are governed by distinct structured regions of orbital space. The recently discovered asteroid, 2022 NX1, exhibits Earth-like orbital parameters where it tran... | [
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On the Claimed <SUP>26</SUP>Al─<SUP>50</SUP>Ti Exclusivity in Presolar Grains. A recent study proposed that calcium─aluminum-rich inclusions (CAIs) and CM hibonites exhibit an exclusivity between 50Ti anomalies and initial 26Al/27Al ratios, such that refractory inclusions with large 50Ti variations necessarily formed f... | [
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Constraints on CMBR Flux due to High-z Dust Emission. E. Gjergo & P. Kroupa have proposed a new foreground cosmic microwave background radiation (CMBR) component produced by dust associated with the progenitor clouds at z = 15─20 that led to the formation of massive early-type galaxies, calculating that a minimum o... | [
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Photometric and Astrometric Information for Sources around HD 163296 Revealed by JWST/NIRCam Coronagraphy. Background stars observed through a circumstellar disk provide valuable benchmarks for investigating the disk's extinction properties. The HD 163296 system is an excellent case study due to its large disk, the cle... | [
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Comparing Stellar Masses Inferred Using HST and JWST Data in A2744. We analyze stellar mass estimates from James Webb Space Telescope (JWST) and Hubble Space Telescope (HST) photometry, examining discrepancies driven by dust extinction, metallicity, age, and attenuation. Using cross-matched catalogs from the Hubble Fro... | [
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Trial Dispersion Measure Spacing in Fast Radio Burst Searches with HEIMDALL. Fast radio bursts (FRBs) are brief flashes of emission detectable to cosmological distances. Cosmology applications rely on an understanding of how the detected sample relates to the underlying population. To this end we examine the dispersion... | [
"http://astrothesaurus.org/uat/1671",
"http://astrothesaurus.org/uat/1338",
"http://astrothesaurus.org/uat/1858",
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Photometric Study of Type Ibn SN 2022ablq Based on g, r, i-band Observations. We present high-cadence photometric observations of the Type Ibn supernova (SN) 2022ablq at 60 Mpc, which exploded at an angular separation of 0.″36 from the nucleus of its host galaxy MRK 0762. Following the initial classification, we init... | [
"http://astrothesaurus.org/uat/1684",
"http://astrothesaurus.org/uat/1668"
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A Spanish Archival Account of a Dawn Bolide over La Calahorra on 1768 September 18 and Its Temporal Proximity to the Lucé Meteorite Fall. Attention is drawn to an eighteenth-century Spanish archival record describing a conspicuous atmospheric phenomenon observed from La Calahorra (Granada, Spain) at dawn on 1768 Septem... | [
"http://astrothesaurus.org/uat/1868",
"http://astrothesaurus.org/uat/538",
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