Bibcode
Cortés-Contreras, M.; Béjar, V. J. S.; Caballero, J. A.; Gauza, B.; Montes, D.; Alonso-Floriano, F. J.; Ribas, I.; Reiners, A.; Quirrenbach, A.; Amado, P. J.; CARMENES Consortium
Bibliographical reference
Highlights of Spanish Astrophysics VIII, Proceedings of the XI Scientific Meeting of the Spanish Astronomical Society held on September 8-12, 2014, in Teruel, Spain, ISBN 978-84-606-8760-3. A. J. Cenarro, F. Figueras, C. Hernández-Monteagudo, J. Trujillo Bueno, and L. Valdivielso (eds.), p. 597-597
Advertised on:
5
2015
Citations
4
Refereed citations
4
Description
With the help of CARMENCITA, the CARMENES Cool dwarf Information and
datA Archive, we investigate the multiplicity of M dwarfs in the solar
neighnourhood observable from Calar Alto to prepare and characterize the
final sample of stars of CARMENES. Our multiplicity study covers a wide
range in projected physical separations, from 0.5 to 50 000 au. The
inner range is covered with a lucky-imaging survey of 385 M dwarfs with
FastCam at the 1.5 m Telescopio Carlos Sánchez (42.3 mas/pix),
complemented with a literature search. We explore visual or physical
companions from 0.15 to 18 arcsec around our targets. These observations
are important to discard very close companions that may induce spurious
variations in the radial velocity of the primary and mimic the presence
of planets. The outer range is covered with a detailed analysis of
Washington Double Stars catalogue data and optical images taken by us
with TCP and CAMELOT at the 0.8 m IAC80 telescope, and an astrometric
study of all-sky public images and catalogues. We review the main
results of our searches and derive the multiplicity of M dwarfs at close
and wide physical separations.