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Discovery of a ZZ Ceti in the Kepler mission field
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Hermes, J. J., Mullally, Fergal, Østensen, R. H., Williams, Kurtis A., Telting, John, Southworth, J. (John), Bloemen, S., Howell, Steve B., Everett, Mark E. and Winget, D. E. (2011) Discovery of a ZZ Ceti in the Kepler mission field. Astrophysical Journal, Vol.741 (No.1). L16. doi:10.1088/2041-8205/741/1/L16 ISSN 0004-637X.
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Official URL: http://dx.doi.org/10.1088/2041-8205/741/1/L16
Abstract
We report the discovery of the first identified pulsating DA white dwarf, WD J1916+3938 (Kepler ID 4552982), in the field of the Kepler mission. This ZZ Ceti star was first identified through ground-based, time-series photometry, and follow-up spectroscopy confirms that it is a hydrogen-atmosphere white dwarf with T(eff) = 11,129 +/- 115 K and log g = 8.34 +/- 0.06, placing it within the empirical ZZ Ceti instability strip. The object shows up to 0.5% amplitude variability at several periods between 800 and 1450 s. Extended Kepler observations of WD J1916+3938 could yield the best light curve, to date, of any pulsating white dwarf, allowing us to directly study the interior of an evolved object representative of the fate of the majority of stars in our Galaxy.
| 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, Stellar oscillations, Variable stars | ||||
| Journal or Publication Title: | Astrophysical Journal | ||||
| Publisher: | IOP Publishing | ||||
| ISSN: | 0004-637X | ||||
| Official Date: | 1 November 2011 | ||||
| Dates: |
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| Volume: | Vol.741 | ||||
| Number: | No.1 | ||||
| Number of Pages: | 4 | ||||
| Page Range: | L16 | ||||
| DOI: | 10.1088/2041-8205/741/1/L16 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Texas Higher Education Coordinating Board. Norman Hackerman Advanced Research Program (NHARP), United States. National Aeronautics and Space Administration (NASA), National Science Foundation (U.S.) (NSF), European Research Council (ERC), Katholieke Universiteit te Leuven (1970- ) (KUL) | ||||
| Grant number: | 003658-0255-2007 (NHARP), 003658-0252-2009 (NHARP), NAG5-13094 (NASA), AST-0909107 (NSF), 227224 (ERC), GOA/2008/04 (KUL) |
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