Article (Scientific journals)
Precision Asteroseismology of the Pulsating White Dwarf GD 1212 Using a Two-wheel-controlled Kepler Spacecraft
Hermes, J.J.; Charpinet, Stéphane; Barclay, Thomas et al.
2014In Astrophysical Journal, 789, p. 85
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Abstract :
[en] 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.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Hermes, J.J.
Charpinet, Stéphane
Barclay, Thomas
Pakstiene, Erika
Mullaly, Fergal
Kawaler, Steven
Bloemen, Steven
Castanheira, Barbara
Winget, Don
Montgomery, Mike
Van Grootel, Valérie  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Huber, Daniel
Still, Martin
Howell, Steve
Caldwell, Douglas
Haas, Michael
Bryson, Stephen
More authors (7 more) Less
Language :
English
Title :
Precision Asteroseismology of the Pulsating White Dwarf GD 1212 Using a Two-wheel-controlled Kepler Spacecraft
Publication date :
July 2014
Journal title :
Astrophysical Journal
ISSN :
0004-637X
eISSN :
1538-4357
Publisher :
IOP Publishing, Bristol, United Kingdom
Volume :
789
Pages :
85
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 01 July 2014

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