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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

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Official URL: http://dx.doi.org/10.1088/2041-8205/741/1/L16

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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 > 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:
DateEvent
1 November 2011Published
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)

Data sourced from Thomson Reuters' Web of Knowledge

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