The search of exoplanets around nearby M dwarfs is a crucial milestone to perform the census of planetary systems in the vicinity of our Solar System. Since 2018 our team […]
CFHT/SPIRou
![Top panel: Comparison of our determined [Fe/H] values (blue line) against the reported metallicity from Mann et al. (2015), Passegger et al. (2019), Maldonado et al. (2020), Marfil et al. (2021) and Cristofari et al. (2022). The red shaded area represents the typical distribution of M dwarfs metallicity from SDSS DR18 (Almeida et al. 2023). Bottom panel: Residuals are plotted to compare the median metallicity values from all referenced studies against each individual work. All measurements are consistent. -- astro-ph.SR](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/11/Chemical-Fingerprints-of-M-Dwarfs.png?resize=1200%2C717&ssl=1)
Posted inAstrochemistry, Astronomy & Telescopes, Imaging & Spectroscopy, Press Release, Stellar Cartography
Chemical Fingerprints of M Dwarfs: High-Resolution Spectroscopy on 31 M Dwarfs with SPIRou
We extend the methodology introduced by Jahandar et al. (2024) to determine the effective temperature and chemical abundances of 31 slowly-rotating solar neighborhood M dwarfs (M1-M5) using high-resolution spectra from […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Characterizing Planetary Systems With SPIRou: A Temperate Sub-Neptune Exoplanet Orbiting The Nearby Fully-convective Star GJ 1289 And A Candidate Around GJ 3378
We report the discovery of two new exoplanet systems around fully convective stars, found from the radial-velocity (RV) variations of their host stars measured with the nIR spectropolarimeter CFHT/SPIRou over […]
Posted inAstronomy & Telescopes, Barnard's Star, Habitable Zones, Imaging & Spectroscopy, Status Report
Comprehensive High-resolution Chemical Spectroscopy of Barnard’s Star with SPIRou
Determination of fundamental parameters of stars impacts all fields of astrophysics, from galaxy evolution to constraining the internal structure of exoplanets.