Discovery of an l4β candidate member of Argus in the planetary mass regime: WISE J231921.92+764544.4

Journal Article · Sun Jan 10 00:00:00 EST 2016 · Astrophysical Journal

DOI:https://doi.org/10.3847/0004-637X/816/2/78· OSTI ID:22882305

Castro, Philip J.

We present the discovery of a young L dwarf, WISE J231921.92+764544.4, identified by comparing the Wide-field Infrared Survey Explorer (WISE) All-Sky Catalog to the Two Micron All Sky Survey (2MASS). A medium-resolution optical spectrum provides a spectral type of L4β, with a photometric distance estimate of 26.1 ± 4.4 pc. The red WISE W1 − W2 color provides additional evidence of youth, while the 2MASS J − K{sub s} color does not. WISE J231921.92+764544.4 is a candidate member of the young moving group Argus, with the space motion and position of WISE J231921.92+764544.4 giving a probability of 79% for membership in Argus and a probability of 21% as a field object, based on BANYAN II. WISE J231921.92+764544.4 has a mass of 12.1 ± 0.4 M{sub Jup} based on membership in Argus, within the planetary mass regime.

• OSTI ID: 22882305
• Journal Information: Astrophysical Journal, Vol. 816, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Since 2009, the country of publication for this journal is the UK.; ISSN 0004-637X
• Country of Publication: United Kingdom
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
CATALOGS
COMPARATIVE EVALUATIONS
DISTANCE
DWARF STARS
INFRARED SURVEYS
MARINE SURVEYS
MASS
PROBABILITY
PROPER MOTION
SPACE
SPECTRA