John E. Gizis and I. Neill Reid 2006 The Astronomical Journal 131 638 doi:10.1086/498262
John E. Gizis1 and I. Neill Reid2
Show affiliations2MASSW J0746425+200322 is the first L dwarf system with a dynamical mass determination. It has been claimed that the system is young (<500 Myr) and that therefore the secondary is clearly substellar. We argue that the balance of evidence suggests the system is old; the secondary is likely either a star or a long-lived transition object.
binaries: general; stars: fundamental parameters; stars: individual (2MASSW J0746425+200322); stars: low-mass, brown dwarfs
Issue 1 (2006 January)
Received 2005 February 3, accepted for publication 2005 September 19
John E. Gizis and I. Neill Reid 2006 The Astronomical Journal 131 638
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