Kinematics of M dwarfs in the CARMENES input catalogue
Abstract
We aim to determine the kinematics of the cool dwarfs in the CARMENES input catalogue (Carmencita) and to identify young active stars, in the frame of the targets characterization of the CARMENES exoplanet survey. We compiled or computed proper motions and distances for 2191 M dwarfs and three K dwarfs, as well as radial velocities for 1475 single stars. With the derived Galactocentric velocities, we placed the 1475 dwarfs into the different Galactic populations including Eggen's young disc. We also associated over 300 stars to stellar kinematic groups younger than 600 Ma. We compiled or measured pEW(Hα), Prot, v sin i, X-rays, NUV and J magnitudes and defined five spectral-type-dependent activity and rotation criteria that confirmed young (t≤600 Ma) cool dwarfs satisfy. Among the 1475 dwarfs, we identified 36 M0-M5 dwarfs that fulfill our youth criteria. Some of them have not stellar kinematic group association but belong to the Galactic young disc.
- Publication:
-
XIV.0 Scientific Meeting (virtual) of the Spanish Astronomical Society
- Pub Date:
- July 2020
- Bibcode:
- 2020sea..confE.131C