WISE BROWN DWARF BINARIES: THE DISCOVERY OF A T5+T5 AND A T8.5+T9 SYSTEM

被引：43
|
作者：
Gelino, Christopher R. [1 ]
Kirkpatrick, J. Davy [1 ]
Cushing, Michael C. [2 ]
Eisenhardt, Peter R. [2 ]
Griffith, Roger L. [1 ]
Mainzer, Amanda K. [2 ]
Marsh, Kenneth A. [1 ]
Skrutskie, Michael F. [3 ]
Wright, Edward L. [4 ]
机构：
[1] CALTECH, Ctr Infrared Proc & Anal, Pasadena, CA 91125 USA
[2] NASA, Jet Prop Lab, Pasadena, CA 91109 USA
[3] Univ Virginia, Dept Astron, Charlottesville, VA 22903 USA
[4] Univ Calif Los Angeles, Dept Astron, Los Angeles, CA 90095 USA
来源：
ASTRONOMICAL JOURNAL | 2011年 / 142卷 / 02期
基金：
美国国家航空航天局;
关键词：
binaries: general; brown dwarfs; stars: fundamental parameters; stars: individual (WISEPA J045853.90+643452.6; WISEPA J075003.78+272544.8; WISEPA J132233.67-234017.0; WISEPA J161441.46+173935.3; WISEPA J161705.75+180714.0; WISEPA J162725.64+325524.1; WISEPA J165311.05+444423.0; WISEPA J174124.27+255319.6; WISEPA J184124.73+700038.0); stars: low-mass; ADAPTIVE OPTICS SYSTEM; INFRARED FILTER SET; T-DWARFS; DYNAMICAL MASS; COOL; TEMPERATURE; SPECTRA; ORBIT;
D O I：
10.1088/0004-6256/142/2/57
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The multiplicity properties of brown dwarfs are critical empirical constraints for formation theories, while multiples themselves provide unique opportunities to test evolutionary and atmospheric models and examine empirical trends. Studies using high-resolution imaging cannot only uncover faint companions, but they can also be used to determine dynamical masses through long-term monitoring of binary systems. We have begun a search for the coolest brown dwarfs using preliminary processing of data from the Wide-field Infrared Survey Explorer and have confirmed many of the candidates as late-type T dwarfs. In order to search for companions to these objects, we are conducting observations using the Laser Guide Star Adaptive Optics system on Keck II. Here we present the first results of that search, including a T5 binary with nearly equal mass components and a faint companion to a T8.5 dwarf with an estimated spectral type of T9.
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页数：9
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