Bibcode
Cortes Contreras, M.; Caballero, J. A.; Bejar, V. J. S.; Gauza, B.; Montes, D.; Alonso-Floriano, F. J.; Ribas, I.; Reiners, A.; Quirrenbach, A.; Amado, P. J.
Bibliographical reference
18th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, Proceedings of the conference held at Lowell Observatory, 8-14 June, 2014. Edited by G. van Belle and H.C. Harris., pp.805-810
Advertised on:
1
2015
Citations
9
Refereed citations
5
Description
With the help of CARMENCITA, the CARMENES Cool dwarf Information and
daTa Archive, we investigate the multiplicity of M dwarfs in the solar
neighbourhood observable from Calar Alto to prepare and characterize the
final sample of CARMENES stars. Our multiplicity study covers a wide
range in projected physical separations, from 0.5 to 55 000 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, 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.