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The BANYAN All-Sky Survey for Brown Dwarf Members of Young Moving Groups

Published online by Cambridge University Press:  27 January 2016

Jonathan Gagné
Affiliation:
Institut de Recherche sur les Exoplanètes (iREx), Université de Montréal, Département de Physique, C.P. 6128 Succ. Centre-ville, Montréal, QC H3C 3J7, Canada. email: [email protected]
David Lafrenière
Affiliation:
Institut de Recherche sur les Exoplanètes (iREx), Université de Montréal, Département de Physique, C.P. 6128 Succ. Centre-ville, Montréal, QC H3C 3J7, Canada. email: [email protected]
René Doyon
Affiliation:
Institut de Recherche sur les Exoplanètes (iREx), Université de Montréal, Département de Physique, C.P. 6128 Succ. Centre-ville, Montréal, QC H3C 3J7, Canada. email: [email protected]
Jacqueline K. Faherty
Affiliation:
Department of Terrestrial Magnetism, Carnegie Institution of Washington, DC 20015, USA Department of Astrophysics, AMNH, Central Park West at 79th Street, New York, NY 10024 Hubble Fellow
Lison Malo
Affiliation:
Institut de Recherche sur les Exoplanètes (iREx), Université de Montréal, Département de Physique, C.P. 6128 Succ. Centre-ville, Montréal, QC H3C 3J7, Canada. email: [email protected] Canada-France-Hawaii Telescope, 65-1238 Mamalahoa Hwy, Kamuela, HI 96743, USA
Kelle L. Cruz
Affiliation:
Department of Astrophysics, AMNH, Central Park West at 79th Street, New York, NY 10024 Department of Physics & Astronomy, Hunter College, City University of New York, 695 Park Avenue, NY 10065, USA
Étienne Artigau
Affiliation:
Institut de Recherche sur les Exoplanètes (iREx), Université de Montréal, Département de Physique, C.P. 6128 Succ. Centre-ville, Montréal, QC H3C 3J7, Canada. email: [email protected]
Adam J. Burgasser
Affiliation:
CASS, UCSD, 9500 Gilman Dr., Mail Code 0424, La Jolla, CA 92093, USA
Marie-Eve Naud
Affiliation:
Institut de Recherche sur les Exoplanètes (iREx), Université de Montréal, Département de Physique, C.P. 6128 Succ. Centre-ville, Montréal, QC H3C 3J7, Canada. email: [email protected]
Sandie Bouchard
Affiliation:
Institut de Recherche sur les Exoplanètes (iREx), Université de Montréal, Département de Physique, C.P. 6128 Succ. Centre-ville, Montréal, QC H3C 3J7, Canada. email: [email protected]
John E. Gizis
Affiliation:
Dept. of Physics and Astronomy, Univ. of Delaware, 104 The Green, Newark, DE 19716, USA
Loïc Albert
Affiliation:
Institut de Recherche sur les Exoplanètes (iREx), Université de Montréal, Département de Physique, C.P. 6128 Succ. Centre-ville, Montréal, QC H3C 3J7, Canada. email: [email protected]
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Abstract

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We describe in this work the BASS survey for brown dwarfs in young moving groups of the solar neighborhood, and summarize the results that it generated. These include the discovery of the 2MASS J01033563–5515561 (AB)b and 2MASS J02192210–3925225 B young companions near the deuterium-burning limit as well as 44 new low-mass stars and 69 new brown dwarfs with a spectroscopically confirmed low gravity. Among those, ~20 have estimated masses within the planetary regime, one is a new L4 γ bona fide member of AB Doradus, three are TW Hydrae candidates with later spectral types (L1–L4) than all of its previously known members and six are among the first contenders for low-gravity ≥ L5 β/γ brown dwarfs, reminiscent of WISEP J004701.06+680352.1, PSO J318.5338–22.8603 and VHS J125601.92–125723.9 b. Finally, we describe a future version of this survey, BASS-Ultracool, that will specifically target ≥ L5 candidate members of young moving groups. First experimentations in designing the survey have already led to the discovery of a new T dwarf bona fide member of AB Doradus, as well as the serendipitous discoveries of an L9 subdwarf and an L5 + T5 brown dwarf binary.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2016 

References

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