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The mass-luminosity relation in the L/T transition: Individual dynamical masses for the new J-band flux reversal binary SDSS J105213.51+442255.7AB

Dupuy, Trent; Liu, Michael C; Leggett, S K; Chiu, Kuenley; Golimowski, David A; Ireland, Michael

Description

We have discovered that SDSS J105213.51+442255.7 (T0.5 ± 1.0) is a binary in Keck laser guide star adaptive optics imaging, displaying a large J- to K-band flux reversal (mag, mag). We determine a total dynamical mass from Keck orbital monitoring (88 ± 5) and a mass ratio by measuring the photocenter orbit from CFHT/WIRCam absolute astrometry (). Combining these provides the first individual dynamical masses for any field L or T dwarfs, 49 ± 3 for the L6.5±1.5 primary and 39 ± 3 for the...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
URI: http://hdl.handle.net/1885/103213
Source: Astrophysical Journal, The
DOI: 10.1088/0004-637X/805/1/56

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