Results from BASS, the BANYAN All-Sky Survey
Jonathan Gagn\'e, David Lafreni\`ere, Ren\'e Doyon, Jacqueline K., Faherty, Lison Malo, \'Etienne Artigau

TL;DR
The BASS survey systematically identified potential brown dwarf members in young moving groups using cross-matched sky catalogs and Bayesian analysis, leading to new discoveries of low-mass objects and companions with signs of youth.
Contribution
This work introduces the BASS catalog of over 300 candidate members of young moving groups, combining cross-matched data and Bayesian analysis, and reports new low-mass star and brown dwarf discoveries.
Findings
Identification of new low-mass stars and brown dwarfs with signs of low gravity.
Evidence for mass segregation in AB Doradus and Argus groups.
Discovery of a new 13 M_Jup co-moving companion with youth indicators.
Abstract
We present results from the BANYAN All-Sky Survey (BASS), a systematic all-sky survey for brown dwarf candidates in young moving groups. We describe a cross-match of the 2MASS and AllWISE catalogs that provides a list of 98 970 potential nearby dwarfs with spectral types later than M5 with measurements of proper motion at precisions typically better than 15 mas yr, as well as the Bayesian Analysis for Nearby Young AssociatioNs II tool (BANYAN II) which we use to build the BASS catalog from this 2MASS-AllWISE cross-match, consisting of more than 300 candidate members of young moving groups. We present the first results of a spectroscopic follow-up of those candidates, which allowed us to identify several new low-mass stars and brown dwarfs displaying signs of low gravity. We use the BASS catalog to show tentative evidence for mass segregation in AB Doradus and Argus, and reveal a…
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Gamma-ray bursts and supernovae
