Brown dwarf companions to white dwarfs

Burleigh, Matt R., Steele, Paul R., Dobbie, Paul D., Farihi, Jay, Napiwotzki, Ralf, Maxted, Pierre F. L., Barstow, Martin A., Jameson, Richard F., Casewell, Sarah L., Gaensicke, Boris T. and Marsh, Tom R. (2011) Brown dwarf companions to white dwarfs. In: Planetary systems beyond the main sequence :. American Institute of Physics (AIP), Meville, pp. 262-270. ISBN 978-0-7354-0886-9
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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%.
Item Type Book Section
Additional information "Copyright 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics."
Keywords white dwarfs, brown dwarfs, binaries
Date Deposited 15 May 2025 16:25
Last Modified 29 Jun 2025 23:16

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