activity
20022026
most citedLithium and Halpha in stars and brown dwarfs of sigma Orionis

191 citations · 1.7k across the 40 of their papers we have counts for

collaborators

32 papers

astro-ph.EP2026

The small transiting planet population revealed by ESPRESSO with extreme precision radial velocities

M. J. Hobson, B. Lavie, F. Bouchy +35

Small planets are extremely common in the Galaxy, including planets with masses and radii between those of Earth and Neptune. Characterizing these planets' masses requires ultra-pr…

astro-ph.EP2025★ 3 cited

TOI-2322: two transiting rocky planets close to the stellar rotation period and its first harmonic

M. J. Hobson, A. Suárez Mascareño, C. Lovis +42

Context. Active regions on the stellar surface can induce quasi-periodic radial velocity (RV) variations that can mimic planets and mask true planetary signals. These spurious sign…

astro-ph.GA2025★ 1 cited

Caveats about measuring carbon abundances in stars using the CH band

Pablo Santos-Peral, Patricia Sánchez-Blázquez, Alejandro Vazdekis +4

Deriving accurate carbon abundance estimates for a wide variety of stars is still complex due to the difficulties in properly measuring it from atomic and molecular lines. The aim…

astro-ph.EP2025

TOI-512: Super-Earth transiting a K-type star discovered by TESS and ESPRESSO

J. Rodrigues, S. C. Barros, N. C. Santos +38

One of the goals of the ESPRESSO guaranteed time observations (GTOs) at the ESO 8.2m telescope is to follow up on candidate planets from transit surveys such as the TESS mission. H…

astro-ph.GA2024★ 9 cited

Mapping the Milky Way with Gaia Bp/Rp spectra I: Systematic flux corrections and atmospheric parameters for 68 million stars

Xianhao Ye, Wenbo Wu, Carlos Allende Prieto +8

Gaia Bp/Rp spectra for over two hundred million stars have great potential for mapping metallicity across the Milky Way. We aim to construct an alternative catalog of atmospheric p…

astro-ph.EP2024★ 27 cited

A sub-Earth-mass planet orbiting Barnard's star

J. I. Gonzalez Hernandez, A. Suarez Mascareno, A. M. Silva +37

Barnard's star is a primary target within the ESPRESSO guaranteed time observations (GTO) as it is the second closest neighbour to our Sun after the Centauri stellar system. We…