A Possible Brown Dwarf Companion to the White Dwarf GD1400
arXiv:astro-ph/0407036 · doi:10.1086/423919
Abstract
An unresolved, likely L dwarf companion to the DA white dwarf GD1400 is reported. This would be only the second such system known, discovered 17 years after the prototype L dwarf, GD165B, was determined to be a companion to a white dwarf. Photometric observations and model predicted stellar parameters of the well studied white dwarf primary indicate that GD1400B has $J-K\ga2.0$ and mag. If correct, this would place GD1400B at spectral type L6, and it would be the lowest luminosity unevolved companion known to a white dwarf, and thus a definite brown dwarf. However, a low resolution Keck NIRSPEC m spectrum may not be consistent with known L dwarfs. Uncertainties in classification remain until the binary is resolved or a trigonometric parallax is measured.
arXiv comment14 pages, 3 figures, 1 table, accepted to AJ
References in corpus (12)
- A Non-Gray Theory of Extrasolar Giant Planets and Brown Dwarfs
- Evolutionary models for very-low-mass stars and brown dwarfs with dusty atmospheres
- The Theory of Brown Dwarfs and Extrasolar Giant Planets
- Astrometry and Photometry for Cool Dwarfs and Brown Dwarfs
- The second US Naval Observatory CCD Astrograph Catalog (UCAC2)
- Sixty-seven Additional L Dwarfs Discovered by the Two Micron All Sky Survey (2MASS)
- Are There Unstable Planetary Systems Around White Dwarfs?
- The NIRSPEC Brown Dwarf Spectroscopic Survey. I. Low-Resolution Near-Infrared Spectra
- L Dwarfs and the Substellar Mass Function
- The First Substellar Subdwarf? Discovery of a Metal-poor L Dwarf with Halo Kinematics
- Coronagraphic Survey for Companions of Stars within 8 pc
- A Near-Infrared Wide-Field Proper Motion Search for Brown Dwarfs
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- Cool Customers in the Stellar Graveyard I: Limits to Extrasolar Planets Around the White Dwarf G29-38
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- The DODO Survey II: A Gemini Direct Imaging Search for Substellar and Planetary Mass Companions around Nearby Equatorial and Northern Hemisphere White Dwarfs
- Infrared Excesses around Bright White Dwarfs from Gaia and unWISE. II
- WD 1202-024: The Shortest-Period Pre-Cataclysmic Variable
- The evolutionary state of short period magnetic white dwarf binaries
- Cool Customers in the Stellar Graveyard IV: Spitzer Search for Mid-IR excesses Around Five DAs
- WIRED for EC: New White Dwarfs with Infrared Excesses and New Classification Schemes from the Edinburgh-Cape Blue Object Survey
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- Fates of the sub-stellar objects (FOSSO) I. Fates of the known brown dwarfs in main-sequence--BD binaries
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