Astronomy
CRIRES+ Spectroscopy Proves Liller 1 Formed In-Situ Within the Galactic Bulge, Not as a Captured Globular Cluster
High-resolution spectroscopic analysis of 30 red giant stars in the bulge fossil fragment Liller 1 reveals multiple stellar sub-populations with distinct metallicities and ages, consistent with self-enrichment and in-situ formation within the Galactic bulge. The absence of sodium-oxygen anticorrelat…
GaiaMoons: Enhancing Binary Asteroid Detection via Stellar Occultations and Gaia Astrometry
The GaiaMoons program leverages Gaia's high-precision astrometry to identify candidate binary asteroids, which are then studied using stellar occultations. This combined approach successfully characterized 101 targets, with four showing potential binary or contact binary features, thereby addressing…
Turbulence Regulates Star Formation in High-Redshift Galaxies: ALMA and JWST Observations
This paper presents high-resolution ALMA observations of CO(5-4) and CO(4-3) in three $z\sim3$ dusty star-forming galaxies, complemented by ALMA continuum and JWST imaging. The molecular gas distribution is found to be more extended than dust emission, comparable to stellar emission. Kinematic model…
Big Ear Observatory: A Legacy of Unexplored Radio Astronomy Data
The Ohio State University Radio Observatory (Big Ear) operated as the world's first dedicated SETI observatory from 1973 to 1998. Over three decades, it surveyed ~70% of the sky, creating an extensive archive of radio astronomy data, including over 40,000 transient narrowband events and unusual radi…
MASCARA-1b Atmosphere Rich in Refractory Elements with Solar C/O Ratio and Evidence of Specific Accretion Zone
A high-resolution cross-correlation spectroscopy analysis of the ultra-hot Jupiter MASCARA-1b using IGRINS and IGRINS-2 has revealed a comprehensive atmospheric inventory, including H$_2$O, CO, OH, Fe I, Mg I, Ca I, and Ti I. The atmosphere is characterized by a solar metallicity and C/O ratio, but …
AGN Feeding-Feedback Cycle Traced Through Spatially Resolved Stellar Populations
A spatially resolved near-IR spectroscopic analysis of three local AGN hosts (NGC 3884, 3C 293, CGCG 012-070) reveals that their inner kiloparsecs are dominated by intermediate-to-old stellar populations with super-solar metallicity, yet all show clear signatures of recent 'rejuvenation' via young s…
Amateur Telescopes Uncover Ancient Faint Planetary Nebulae
Modern amateur telescopes with long-integration narrow-band imaging at dark-sky sites detect evolved 'ghost' planetary nebulae that have faded into the interstellar medium. Three new candidates (JAM 2, JAM 3, JAM 4), each several arcminutes across with [O III] surface brightness ~30 mag arcsec^{-2},…
SVOM and GOTO Collaboration Reveals Luminous GRB Afterglow with Ambiguous Host Association
The coordinated efforts of SVOM and GOTO enabled rapid localization and multi-wavelength follow-up of GRB 250818B. Analysis of broadband light curves and spectral energy distributions revealed an unusually luminous afterglow, even for a short GRB, indicating refreshed emission. Despite detailed obse…
JWST Detects Carbon Disulfide and Chemical Coupling in a Warm Giant Exoplanet Atmosphere
JWST transmission spectroscopy of exoplanet WASP-80 b reveals the presence of CS2, H2O, CH4, CO2, and NH3. The detected CS2 abundance is significantly higher than previously predicted, supporting recent chemical models that incorporate efficient carbon-sulfur coupling via CH2S. This finding provides…
Methanol Maser Ring Expands at 0.01c, Tracing Explosive Heat Wave from Massive Protostar Outburst
ALMA imaging reveals a circular millimeter methanol maser ring around the outbursting massive protostar G358.93-0.03 MM1, with diameter expanding from ~1100 to ~1800 au over 200 days at ~0.01c. The ring's angular extent follows a power law R ∝ t^{0.39±0.06}, matching the t^{2/5} prediction of the Ta…
BCG Ellipticity as a Biased Proxy for Cluster Halo Orientation
This study evaluates the utility of Brightest Cluster Galaxy (BCG) ellipticity as a proxy for galaxy cluster orientation in SZ-selected samples. While BCG shape correlates with optical richness due to projection effects, it fails to predict 1-halo density profiles and produces 2-halo results that co…
Saros Series 145: A Millennium of Solar Eclipses
Saros Series 145 is a comprehensive solar eclipse cycle spanning from 1639 to 3009. This series comprises 77 eclipses, with 43 being umbral, categorized into annular, hybrid, and total types. The series demonstrates a clear progression from partial to total eclipses, with a peak duration in member 5…