Bibcode
Chinchilla, P.; Béjar, V. J. S.; Lodieu, N.; Zapatero Osorio, M. R.; Gauza, B.; Rebolo, R.; Pérez Garrido, A.
Referencia bibliográfica
Highlights on Spanish Astrophysics X, Proceedings of the XIII Scientific Meeting of the Spanish Astronomical Society held on July 16-20, 2018, in Salamanca, Spain, ISBN 978-84-09-09331-1. B. Montesinos, A. Asensio Ramos, F. Buitrago, R. Schödel, E. Villaver, S. Pérez-Hoyos, I. Ordóñez-Etxeberria (eds.) p. 283-289
Fecha de publicación:
3
2019
Número de citas
0
Número de citas referidas
0
Descripción
We have performed a search for substellar objects as common proper
motion companions to young nearby stars (including members of the Young
Moving Groups AB Doradus, TW Hydrae, Tucana-Horologium and Beta
Pictoris, and the Upper Scorpius young association) up to separations of
50,000 AU, using the VISTA Hemisphere Survey and 2MASS astrometric and
photometric data. We have found tens of candidates with spectral types
from M to L, and estimated masses from low-mass stars to the
deuterium-burning limit mass. For some of these candidates, we have also
obtained optical and/or near-infrared spectroscopy confirming them as
true companions. We present the preliminary results of our searches and
discuss the most outstanding cases. Our studies show that the frequency
of young companions is higher than of the field-age ones.