Whether the presence of planets affects the lithium (Li) abundance of their host stars is still an open question.
astro-ph.SR
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Status Report
Diversity of Cold Worlds: A Near Complete Spectral Energy Distribution for 2MASS J04151954-0935066 using JWST
We present the a near complete spectral energy distribution (SED) for an extrasolar world: the T8 brown dwarf 2MASS~J04151954−0935066. Spanning from optical to mid-infrared (0.7–20.4 micron) wavelengths, the SED for […]
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Interstellar, Status Report
Charting Circumstellar Chemistry of Carbon-rich Asymptotic Giant Branch Stars. II. Abundances and Spatial Distributions of CS
The circumstellar envelopes (CSEs) of asymptotic giant branch (AGB) stars harbour a rich variety of molecules and are sites of complex chemistry.
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Status Report
JWST Observations of Segregated 12CO2 And 13CO2 Ices In Protostellar Envelopes
The evolution of interstellar ices can be studied with thermal tracers such as the vibrational modes of CO2 ice that show great diversity depending on their local chemical and thermal […]
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biophysics, Status Report
Influence of Dark Matter on the Formation of Biogenic Elements in Early Universe Stars
We demonstrate that dark matter interactions can profoundly influence stellar nucleosynthesis in the early universe by altering thermodynamic gradients and modifying nuclear reaction rates within primordial stars.
Posted inAstrochemistry, Astrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Gas Giants, Ice Giant, Icy Worlds, Status Report, Water/Hycean Worlds & Oceanography
Diversity Of Exoplanets
This review article delves into the study of low-mass exoplanets: super-Earths, mini-Neptunes and the new categories within and between that we are starting to discover.
Posted inAstrochemistry, Astrogeology, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Status Report
The Present-day Cosmic Phosphorus Abundance
The present-day phosphorus abundance in the solar neighbourhood is determined from a sample of OB-type stars.
Posted inAstrochemistry, Astrogeology, Astronomy & Telescopes, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Interstellar, Status Report
The JDISC Survey: Linking the Physics and Chemistry of Inner and Outer Protoplanetary Disk Zones
MIRI spectra of select targets from the JDISCS sample, representing broad categories of sources, namely: intermediate mass, transition disk (with a large dust cavity), solar-mass with weak water emission, solar-mass […]
![[TOP] (RGB)-color images of TOI 5389, TOI 5628, CTOI 29106627, and CTOI 333792947 with their white dwarf companions composed of y-, i- and g-band Pan-STARRS images. The image of CTOI 320261550 and its white dwarf companion is made of i-, r-, and g-band images taken in the SkyMapper Southern Sky Survey. [BOTTOM] (RGB)-color images of the binary systems TOI 5233 AB, TOI 5392 AB, TOI 5397 AB, and CTOI 388076422 BA, composed of R-, V-, and B-band images, taken with the CTK-II at the University Observatory Jena. -- astro-ph.SR](https://i0.wp.com/astrobiology.com/wp-content/uploads/2025/05/Gaia-Search-For-Stellar-Companions-Of-1.png?resize=1200%2C703&ssl=1)
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Gaia Search For Stellar Companions Of TESS Objects Of Interest V
In this paper we present the latest results of our ongoing multiplicity survey of (Community) TESS Objects of Interest, using astrometry and photometry from the latest data release of the […]
Posted inAstronomy & Telescopes, Habitable Zones, Radiation, Space Weather & Heliophysics, Status Report
Temporal Variation of Flare Occurrence Rates via the Spot Evolution on the Sun and Solar-type Stars
The spot evolution on the Sun and solar-type stars is important for understanding the nature of consequential flaring activity.