Discovery of the Young L Dwarf WISE J174102.78-464225.5

February 2014 • 2014AJ....147...34S

Authors • Schneider, Adam C. • Cushing, Michael C. • Kirkpatrick, J. Davy • Mace, Gregory N. • Gelino, Christopher R. • Faherty, Jacqueline K. • Fajardo-Acosta, Sergio • Sheppard, Scott S.

Abstract • We report the discovery of the L dwarf WISE J174102.78-464225.5, which was discovered as part of a search for nearby L dwarfs using the Wide-field Infrared Survey Explorer (WISE). The distinct triangular peak of the H-band portion of its near-infrared spectrum and its red near-infrared colors (J - K_S = 2.35 ± 0.08 mag) are indicative of a young age. Via comparison to spectral standards and other red L dwarfs, we estimate a near-infrared spectral type of L7 ± 2 (pec). From a comparison to spectral and low-mass evolutionary models, we determine self-consistent effective temperature, log g, age, and mass values of 1450 ± 100 K, 4.0 ± 0.25 (cm s^-2), 10-100 Myr, and 4-21 M _Jup, respectively. With an estimated distance of 10-30 pc, we explore the possibility that WISE J174102.78-464225.5 belongs to one of the young nearby moving groups via a kinematic analysis and we find potential membership in the β Pictoris or AB Doradus associations. A trigonometric parallax measurement and a precise radial velocity can help to secure its membership in either of these groups.

Links

• SIMBAD http://simbad.u-strasbg.fr/simbo.pl?bibcode=2014AJ....147...34S
• PDF https://iopscience.iop.org/article/10.1088/0004-6256/147/2/34/pdf
• PDF https://stacks.iop.org/1538-3881/147/34/pdf
• PREPRINT http://arxiv.org/abs/1311.5941
• DATA http://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/147/34
• DATA https://irsa.ipac.caltech.edu/bibdata/2014/S/2014AJ....147...34S.html
• ELECTR https://doi.org/10.1088%2F0004-6256%2F147%2F2%2F34