Discovery of the Young L Dwarf WISE J174102.78–464225.5
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.
Additional Information
© 2014 American Astronomical Society. Received 2013 October 18; accepted 2013 November 22; published 2014 January 9. We would like to acknowledge the recently discovered young late-type L dwarf (and likely β Pictoris Moving Group member) PSO J318.5338−228603 (Liu et al. 2013), which was published during the refereeing phase of this manuscript. Its extremely red near-infrared colors and low estimated mass make it another great young, low-mass object for substellar evolution studies and exoplanetary comparisons. This research has made use of the SIMBAD database and VizieR catalog access tool, operated at CDS, Strasbourg, France. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation, and the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. This research has made use of the NASA/IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. This research has benefitted from the SpeX Prism Spectral Libraries, maintained by Adam Burgasser at http://pono.ucsd.edu/∼adam/browndwarfs/spexprism. This research has benefitted from the M, L, T, and Y dwarf compendium housed at dwarfarchives.org. G.N.M. was a Visiting Astronomer at the Infrared Telescope Facility, which is operated by the University of Hawaii under Cooperative Agreement No. NNX−08AE38A with the National Aeronautics and Space Administration, Science Mission Directorate, Planetary Astronomy Program. The Brown Dwarf Spectroscopic Survey is hosted by UCLA and provided an essential comparison library for our moderate resolution spectroscopy.Attached Files
Published - 1538-3881_147_2_34.pdf
Submitted - 1311.5941v1.pdf
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Additional details
- Eprint ID
- 43845
- Resolver ID
- CaltechAUTHORS:20140218-075708116
- NSF
- Wide-field Infrared Survey Explorer
- NASA/JPL/Caltech
- NASA
- NNX-08AE38A
- Created
-
2014-02-18Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)