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

页码：262 / +

页数：3

共 29 条

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