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Keck laser guide star adaptive optics monitoring of the M8+L7 binary LHS 2397aAB: First dynamical mass benchmark at the L/T transition

Dupuy, Trent J; Liu, Michael C; Ireland, Michael

Description

We present Keck laser guide star adaptive optics imaging and aperture masking observations of the M8+L7binary LHS2397aAB. Together with archival Hubble Space Telescope, Gemini-North, and Very Large Telescope data, our observations span 11.8years of the binary's 14.2year orbital period. We determine a total dynamical mass of 0.146+0.015-0.013M ⊙ (153+16-14 M Jup). Using the combined observational constraints of the total mass and individual luminosities, the Tucson (Lyon) evolutionary models...[Show more]

CollectionsANU Research Publications
Date published: 2009
Type: Journal article
URI: http://hdl.handle.net/1885/66939
Source: Astrophysical Journal Letters
DOI: 10.1088/0004-637X/699/1/168

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