We update the status of the spectropolarimetric campaign dedicated to characterise the magnetic field properties of a sample of known exoplanet-hosting stars included in the current target list of the […]
The well-known correlation between stellar metallicity and planet occurrence is strongest for giant planets, but weaker for smaller planets, suggesting that detailed elemental patterns beyond [Fe/H] may be relevant.
B.5 Research and Development of Initiatives of Advanced New Technologies (RADIANT) seeks innovative adaptations and applications of existing AI techniques, concepts, methodologies, etc. to demonstrate their feasibility and potential to […]
A geomagnetic superstorm is an extreme space weather event that occurs when the Sun releases massive amounts of energy and charged particles toward Earth. These storms are rare, occurring about […]
Context. The spectral lines of the CH molecule are a key carbon (C) abundance diagnostic in FGKM-type stars. These lines are detectable in metal-rich and, in contrast to atomic C […]
With more than a dozen significant detections, the helium triplet has emerged as a key tracer of evaporating exoplanet atmospheres.
Accurate surface rotation measurements are crucial to estimate stellar ages and improve our understanding of stellar rotational evolution.
We present a near-infrared spectroscopic analysis (0.9-2.4 micron) of gravity indices for 57 ultracool dwarfs (spectral types M5.5 to L0), including exoplanet hosts TRAPPIST-1, SPECULOOS-2, SPECULOOS-3, and LHS 3154. Our […]
![Distribution of [Fe/H] versus age for the stars of our sample, distinguished by the possible subgroups. -- astro-ph.SR](https://i0.wp.com/astrobiology.com/wp-content/uploads/2025/06/Signatures-Of-Planets-And-Galactic.png?resize=1200%2C718&ssl=1)
The aim of this work is to obtain precise atmospheric parameters and chemical abundances automatically for solar twins and analogs to find signatures of exoplanets, as well as to assess […]
Ly-α observations provide a powerful probe of stellar activity and atmospheric escape in exoplanetary systems.
