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Title: Brown Dwarf Companions to White Dwarfs
Authors: Burleigh, Matt R.
Steele, P. R.
Dobbie, P. D.
Farihi, Jay
Napiwotzki, R.
Maxted, P. F. L.
Barstow, Martin A.
Jameson, Richard F.
Casewell, Sarah L.
Gaensicke, B. T.
Marsh, T. R.
First Published: 10-Mar-2011
Presented at: International Conference on Planetary Systems beyond the Main Sequence, Bamberg, GERMANY
Start Date: 11-Aug-2010
End Date: 14-Aug-2010
Publisher: American Institute of Physics
Citation: PLANETARY SYSTEMS BEYOND THE MAIN SEQUENCE, AIP Conf. Proc. 1331, 262 (2011)
Abstract: 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 ≈ 0.05M⊙ 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 ≤ fWD+BD ≤ 1.3%
DOI Link: 10.1063/1.3556209
ISSN: 0094-243X
ISBN: 978-0-7354-0886-9
eISSN: 1551-7616
Version: Post-print
Status: Peer-reviewed
Type: Conference Paper
Rights: Creative Commons “Attribution Non-Commercial No Derivatives” licence CC BY-NC-ND, further details of which can be found via the following link: Archived with reference to SHERPA/RoMEO and publisher website.
Description: PACS: 97,98
Appears in Collections:Conference Papers & Presentations, Dept. of Physics and Astronomy

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