- SPIRou Input Catalogue: Global properties of 440 M dwarfs observed with ESPaDOnS at CFHT doi link

Auteur(s): Fouqué Pascal(Corresp.), Moutou Claire, Malo Lison, Martioli Eder, Lim Olivia, Rajpurohit Arvind, Artigau Etienne, Delfosse Xavier, Donati Jean-françois, Forveille Thierry, Morin J., Allard France, Delage Raphaël, Doyon René, Hébrard Elodie, Neves Vasco

(Article) Publié: Monthly Notices Of The Royal Astronomical Society, vol. 475 p.1960–1986 (2018)

Ref HAL: hal-01760619_v1
Ref Arxiv: 1712.04490
DOI: 10.1093/mnras/stx3246
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote

Present and future high-precision radial-velocity spectrometers dedicated to the discovery of low-mass planets orbiting low-mass dwarfs need to focus on the best selected stars to make an efficient use of telescope time. In the framework of the preparation of the SPIRou Input Catalog, the CoolSnap program aims at screening M dwarfs in the solar neighborhood against binarity, rapid rotation, activity, ... To optimize the selection, the present paper describes the methods used to compute effective temperature, metallicity, projected rotation velocity of a large sample of 440 M dwarfs observed in the visible with the high-resolution spectro-polarimeter ESPaDOnS at CFHT. It also summarizes known and newly-discovered spectroscopic binaries, and stars known to belong to visual multiple systems. A calibration of the projected rotation velocity versus measured line widths for M dwarfs observed by the ESPaDOnS spectro-polarimeter is derived, and the resulting values are compared to equatorial rotation velocities deduced from rotation periods and radii. A comparison of the derived effective temperatures and metallicities with literature values is also conducted. Finally, the radial velocity uncertainty of each star in the sample is estimated, to narrow down the selection of stars to be included into the SPIRou Input Catalogue (SPIC).

Commentaires: 34 pages, 12 figures, 13 tables