[astro-ph.SR] Low-mass GKM dwarfs are prime targets for finding habitable-zone Earth-sized planets, but their frequent flares, especially on M~dwarfs, can strongly affect planetary atmospheres through enhanced UV/XUV radiation and stellar […]
astro-ph.SR
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Magnetic Fields, Electromagnetism, bioelectricity,, Space Weather & Heliophysics, Status Report, Stellar Cartography
Summary Of The First Year Of The Space Weather Around Young Suns Program: 900 Hours Of Low-frequency Radio And Optical Data Dedicated To Young, Solar-type Stars
The Space Weather Around Young Suns (SWAYS) program was introduced in Davis2025 as a multi-wavelength monitoring program for studying the activity and particle environments of nearby, young, solar-type stars.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Analysis Of The Young Disk Around WRAY 15-1880: Does It Contain A Primitive Planetary System?
Observations of (giant) planets accreting material within their natal environment are crucial to constrain models for their formation.
Posted inAstrochemistry, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Status Report
First Detection of HC5N in a Class II Disk around TW Hya
Over the last decade of ALMA’s operation the molecular inventory of protoplanetary disks has expanded rapidly, revealing a diverse set of nitrogen-bearing organics and carbon-chain molecules that trace both prebiotic […]
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Imaging & Spectroscopy, Interstellar, Status Report
Ca-bearing Cyanopolyynes in IRC+10216
In recent years, a number of metal-containing, carbon-chain species have been detected in the external circumstellar envelope of the carbon-rich AGB star IRC+10216.
Posted inAstrochemistry, Astronomy & Telescopes, Imaging & Spectroscopy, Status Report, Stellar Cartography
Stellar Population Astrophysics (SPA) With The TNG. CNO Abundances In 28 Open Clusters
Aims. Our main aim with this work was to enlarge the pool of open clusters with determined carbon, nitrogen, and oxygen abundances in evolved giants to further advance chemical clocks […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Optical Transmission Spectrum Of HAT-P-47b: Evidence For Aerosols And Tentative TiO Absorption
Transmission spectroscopy enables the characterization of exoplanet atmospheres by probing absorption features in their terminator regions.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Habitable Zones, Radiation, Space Weather & Heliophysics, Status Report
Exploring Space Weather From Young Solar-like Stars as Windows to Exoplanetary Habitability
Young solar-like stars are efficient generators of magnetic activity, superflares, coronal mass ejections (CMEs), and stellar energetic particles. These phenomena drive the early evolution of stars and shape the habitability […]
Posted inAlpha Centauri, Astronomy & Telescopes, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Space Weather & Heliophysics, Status Report, Stellar Cartography
Near UV Stellar Activity and Brightness Fluctuations of the Alpha Centauri AB Star System from Weeks to Decades — Inputs for Reflected Light Spectroscopy with HWO
We present the most comprehensive near-ultraviolet (NUV: 2550-3255 Angstrom) activity record to date for the Alpha Centauri AB system, combining archival IUE and HST observations spanning nearly five decades with […]
Posted inAI - Data - Apps - Cybernetics, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Brown Dwarfs, Gas Giants, Nomenclature, Systematics, Natural History, Status Report, Stellar Cartography
Spectral Classification Of Brown Dwarfs Using Machine Learning
Brown dwarfs are compact objects that do not reach temperatures high enough to produce sustained hydrogen fusion. Consequently, they cool over time, gradually evolving through later spectral types.