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|Title:||Brown Dwarf Companions to White Dwarfs|
|Authors:||Burleigh, Matt R.|
Steele, P. R.
Dobbie, P. D.
Maxted, P. F. L.
Barstow, Martin A.
Jameson, Richard F.
Casewell, Sarah L.
Gaensicke, B. T.
Marsh, T. R.
|Presented at:||International Conference on Planetary Systems beyond the Main Sequence, Bamberg, GERMANY|
|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%|
|Rights:||Creative Commons “Attribution Non-Commercial No Derivatives” licence CC BY-NC-ND, further details of which can be found via the following link: http://creativecommons.org/licenses/by-nc-nd/4.0/ Archived with reference to SHERPA/RoMEO and publisher website.|
|Appears in Collections:||Conference Papers & Presentations, Dept. of Physics and Astronomy|
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|1102.0505v1.pdf||Post-review (final submitted author manuscript)||292.77 kB||Adobe PDF||View/Open|
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