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A search for variable white dwarfs in large-area time-domain surveys : a pilot study in SDSS Stripe 82
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Gentile Fusillo, N. P., Hermes, J. J. and Gänsicke, B. T. (Boris T.) (2015) A search for variable white dwarfs in large-area time-domain surveys : a pilot study in SDSS Stripe 82. Monthly Notices of the Royal Astronomical Society, 455 (3). pp. 2295-2307. doi:10.1093/mnras/stv2493 ISSN 0035-8711.
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Official URL: http://dx.doi.org/10.1093/mnras/stv2493
Abstract
We present a method to reliably select variable white dwarfs from large-area time-domain surveys and apply this method in a pilot study to search for pulsating white dwarfs in the Sloan Digital Sky Survey Stripe 82. From a sample 400 high-confidence white dwarf candidates, we identify 24 which show significant variability in their multi-epoch Stripe 82 data. Using colours, we further selected a sample of pulsating white dwarf (ZZ Ceti) candidates and obtained high-cadence follow-up for six targets. We confirm five of our candidates as cool ZZ Cetis, three of which are new discoveries. Among our 24 candidates we also identify: one eclipsing binary, two magnetic white dwarfs and one pulsating PG1159 star. Finally, we discuss the possible causes for the variability detected in the remaining targets. Even with sparse multi-epoch data over the limited area of Stripe 82, we demonstrate that our selection method can successfully identify various types of variable white dwarfs and efficiently select high-confidence ZZ Ceti candidates.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
| Library of Congress Subject Headings (LCSH): | White dwarf stars | ||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||
| Publisher: | Oxford University Press | ||||||||
| ISSN: | 0035-8711 | ||||||||
| Official Date: | 21 November 2015 | ||||||||
| Dates: |
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| Volume: | 455 | ||||||||
| Number: | 3 | ||||||||
| Page Range: | pp. 2295-2307 | ||||||||
| DOI: | 10.1093/mnras/stv2493 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Date of first compliant deposit: | 10 March 2017 | ||||||||
| Date of first compliant Open Access: | 10 March 2017 | ||||||||
| Funder: | Science and Technology Facilities Council (Great Britain) (STFC), Seventh Framework Programme (European Commission) (FP7), European Research Council (ERC), Alfred P. Sloan Foundation, National Science Foundation (U.S.) (NSF), United States. Department of Energy. Office of Basic Energy Sciences (OBES) | ||||||||
| Grant number: | FP/2007-2013 (FP7), 320964 (ERC) |
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