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Precision asteroseismology of the pulsating white dwarf gd 1212 using a two-wheel-controlledkeplerspacecraft
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Hermes, J. J., Charpinet, S., Barclay, Thomas, Pakštienė, E., Mullally, Fergal, Kawaler, Steven D., Bloemen, S., Castanheira, Barbara G., Winget, D. E., Montgomery, M. H., Van Grootel, V., Huber, Daniel, Still, Martin, Howell, Steve B., Caldwell, Douglas A., Haas, Michael R. and Bryson, Stephen T. (2014) Precision asteroseismology of the pulsating white dwarf gd 1212 using a two-wheel-controlledkeplerspacecraft. The Astrophysical Journal, Volume 789 (Number 1). Article number 85. doi:10.1088/0004-637X/789/1/85 ISSN 0004-637X.
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Official URL: http://dx.doi.org/10.1088/0004-637X/789/1/85
Abstract
We present a preliminary analysis of the cool pulsating white dwarf (WD) GD 1212, enabled by more than 11.5 days of space-based photometry obtained during an engineering test of the two-reaction-wheel-controlled Kepler spacecraft. We detect at least 19 independent pulsation modes, ranging from 828.2-1220.8 s, and at least 17 nonlinear combination frequencies of those independent pulsations. Our longest uninterrupted light curve, 9.0 days in length, evidences coherent difference frequencies at periods inaccessible from the ground, up to 14.5 hr, the longest-period signals ever detected in a pulsating WD. These results mark some of the first science to come from a two-wheel-controlled Kepler spacecraft, proving the capability for unprecedented discoveries afforded by extending Kepler observations to the ecliptic.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
Journal or Publication Title: | The Astrophysical Journal | ||||||||
Publisher: | Institute of Physics Publishing, Inc. | ||||||||
ISSN: | 0004-637X | ||||||||
Official Date: | 17 June 2014 | ||||||||
Dates: |
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Volume: | Volume 789 | ||||||||
Number: | Number 1 | ||||||||
Article Number: | Article number 85 | ||||||||
DOI: | 10.1088/0004-637X/789/1/85 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access |
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