Brown Dwarf Companions to White Dwarfs

被引：0
作者：
Burleigh, Matt R. [1 ]
Steele, Paul R. [2 ]
Dobbie, Paul D. [3 ]
Farihi, Jay [1 ]
Napiwotzki, Ralf [4 ]
Maxted, Pierre F. L. [5 ]
Barstow, Martin A. [1 ]
Jameson, Richard F. [1 ]
Casewell, Sarah L. [1 ]
Gaensicke, Boris T. [6 ]
Marsh, Tom R. [6 ]
机构：
[1] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England
[2] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany
[3] Australian Astron Observat, Sydney, NSW 1710, Australia
[4] Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England
[5] Keele Univ, Astrophys Grp, Keele ST5 5BG, Staffs, England
[6] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England
来源：
PLANETARY SYSTEMS BEYOND THE MAIN SEQUENCE | 2011年 / 1331卷
关键词：
White Dwarfs; Brown Dwarfs; Binaries; FINAL MASS RELATION; DATA RELEASE; T-DWARFS; BINARY; STARS; CATALOG; DESERT;
D O I：
10.1063/1.3556209
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Brown dwarf companions to white dwarfs are rare, but recent infra-red surveys are slowly revealing examples. We present new observations of the post-common envelope binary WD0137-349, which reveals the effects of irradiation on the approximate to 0.05M(circle dot) secondary, and new observations of GD 1400 which show that it too is a close, post-common envelope system. We also present the latest results in a near-infrared photometric search for unresolved ultra-cool companions and to white dwarfs with UKIDSS. Twenty five DA white dwarfs were identified as having photometric excesses indicative of a low mass companion, with 8-10 of these having a predicted mass in the range associated with brown dwarfs. The results of this survey show that the unresolved (< 2 '') brown dwarf companion fraction to DA white dwarfs is 0.3 <= f(WD+BD) <= 1.3%.
引用
收藏
页码：262 / +
页数：3
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