Search for wide substellar companions to young nearby stars with the VISTA Hemisphere Survey

Bibcode
2019hsax.conf..283C
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 autores
7
Número de autores del IAC
4
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.
Tipo
Sin árbitro

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