3 papers
astro-ph.EP2025
An updated catalog of HIRES/Keck radial velocity measurements. Including Ca II H&K measurements
Jerusalem T. Teklu, Volker Perdelwitz, R. Paul Butler +4
The first HIRES/Keck precision radial velocity (RV) catalog was released in 2017; it was followed by a second release in 2019, which incorporated corrections for small but signific…
astro-ph.EP2024
Potential Interior Structures and Habitability of Super-Earth Exoplanets LHS 1140 b, K2-18 b, TOI-1452 b and TOI-1468 c
Mangesh Daspute, Amri Wandel, Ravi Kumar Kopparapu +3
We analyze four super-Earth exoplanets, LHS 1140 b, K2-18 b, TOI-1452 b, and TOI-1468 c, which orbit M-dwarf stars in the habitable zone. Their relative proximity, within 40 parsec…
astro-ph.SR2024
Analysis of the public HARPS/ESO spectroscopic archive -- Ca II H&K time series for the HARPS radial velocity database
V. Perdelwitz, T. Trifonov, J. T. Teklu +2
Magnetic activity is currently the primary limiting factor in radial velocity (RV) exoplanet searches. Even inactive stars, such as the Sun, exhibit RV jitter of the order of a few…