John E. Gizis et al. 2001 The Astronomical Journal 121 2185 doi:10.1086/319937
A 2MASS L Dwarf Companion to the Nearby K Dwarf GJ 1048
FREE ISSUEJohn E. Gizis1,3, J. Davy Kirkpatrick1 and John C. Wilson2
Show affiliationsWe report the discovery of a probable L1 companion to the nearby K2 dwarf GJ 1048 using the Two Micron All-Sky Survey (2MASS). This source, 2MASSI J0235599-233120, or GJ 1048B, has 2MASS near-infrared colors and absolute magnitudes consistent with an early L dwarf companion with a projected separation of 250 AU. The L1 spectral type is confirmed by far-red optical and low-resolution IR spectroscopy. We present evidence that GJ 1048 is a young (
1 Gyr) system, and that GJ 1048B may be a high-mass brown dwarf below the hydrogen burning limit. Additional studies of the GJ 1048 system will help constrain the characteristics of L dwarfs as a function of age and mass.
- Keywords
binaries: general; solar neighborhood; stars: low-mass, brown dwarfs
- Dates
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Issue 4 (2001 April)
Received 2000 April 19, accepted for publication 2000 December 20
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A 2MASS L Dwarf Companion to the Nearby K Dwarf GJ 1048
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