ESPRESSO at VLT. On-sky performance and first results
Context. ESPRESSO is the new high-resolution spectrograph of ESO's Very Large Telescope (VLT). It was designed for ultra-high radial-velocity (RV) precision and...
ESPRESSO mass determination of TOI-263b: an extreme inhabitant of the brown dwarf desert
The TESS mission has reported a wealth of new planetary systems around bright and nearby stars amenable for detailed characterizations of planet properties and...
ESPRESSO reveals blueshifted neutral iron emission lines on the dayside of WASP-76 b
Context. Ultra hot Jupiters (gas giants with T eq > 2000 K) are intriguing exoplanets due to the extreme physics and chemistry present in their atmospheres...
The acronym ESPRESSO stems for Echelle SPectrograph for Rocky Exoplanets and Stable Spectroscopic Observations; this instrument will be the next VLT high...
Estimating fundamental parameters of nearby M dwarfs from SPIRou spectra
We present the results of a study aiming at retrieving the fundamental parameters of M dwarfs from spectra secured with SPIRou, the near-infrared high...
Estimating the atmospheric properties of 44 M dwarfs from SPIRou spectra
We describe advances on a method designed to derive accurate parameters of M dwarfs. Our analysis consists in comparing high-resolution infrared spectra...
Estimation of Nitrogen-to-Iron Abundance Ratios from Low-Resolution Spectra
We present a method to determine nitrogen abundance ratios with respect to iron ([N/Fe]) from molecular CN-band features observed in low-resolution (R ∼ 2000)...