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Remnant planetary systems around bright white dwarfs

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journal contribution
posted on 04.05.2016, 10:47 by S. D. Barber, Claudia Belardi, M. Kilic, A. Gianninas
We cross-correlate several sources of archival photometry for 1265 bright (V ∼ 16 mag) white dwarfs (WDs) with available high signal-to-noise spectroscopy. We find 381 WDs with archival Spitzer+IRAC data and investigate this subsample for infrared excesses due to circumstellar dust. This large data set reveals 15 dusty WDs, including three new debris discs and the hottest WD known to host dust (WD 0010+280). We study the frequency of debris discs at WDs as function of mass. The frequency peaks at 12.5 per cent for 0.7–0.75 M⊙ WDs (with 3 M⊙ main-sequence star progenitors) and falls off for stars more massive than this, which mirrors predicted planet occurrence rates for stars of different masses.

Funding

We gratefully acknowledge the support of NASA and NSF under grants NNX14AF65G and AST-1312678, respectively.

History

Citation

Monthly Notices of the Royal Astronomical Society (June 21, 2016) 459 (2): 1415-1421.

Version

VoR (Version of Record)

Published in

Monthly Notices of the Royal Astronomical Society (June 21

Publisher

Oxford University Press (OUP), Royal Astronomical Society

issn

0035-8711

eissn

1365-2966

Acceptance date

20/03/2016

Available date

04/05/2016

Publisher version

http://mnras.oxfordjournals.org/content/459/2/1415

Notes

Additional Supporting Information may be found in the online version of this article: Table 3. IRAC Ch 1 and Ch 2 photometry. (http://www.mnras.oxfordjournals.org/lookup/suppl/doi:10.1093/ mnras/stw683/-/DC1).

Language

en

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