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An Asteroseismological Study of the Rapidly Pulsating Subdwarf B Star PG 0911+456
Randall, Suzanna K.; Green, Elizabeth M.; Van Grootel, Valérie et al.
2008In Leaflet - Astronomical Society of the Pacific, 392, p. 309
Peer reviewed
 

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Abstract :
[en] We present the analysis and interpretation of 57 hours of time-series photometry obtained with the new Mont4kccd on Mt. Bigelow, Arizona, for the rapidly pulsating sdB star PG 0911+456. Thanks to the impressively high S/N of the data we were able to extract 7 independent periodicities in the 140-200 s range with amplitudes down to 0.05 % of the mean stellar brightness. On the basis of these we performed an asteroseismological search for the optimal model and derived the star's fundamental parameters. Given that there are now 12 sdB stars for which asteroseismology has been performed, the results are starting to become significant from a statistical point of view and evolutionary trends are slowly emerging.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Randall, Suzanna K.;  European Southern Observatory
Green, Elizabeth M.;  University of Arizona
Van Grootel, Valérie  ;  Université de Toulouse/Université de Montréal (UdeM)
Fontaine, Gilles;  Université de Montréal - UdeM
Brassard, Pierre;  Université de Montréal - UdeM
Charpinet, Stéphane;  Laboratoire d'Astrophysique de Toulouse-Tarbes (LATT)
Language :
English
Title :
An Asteroseismological Study of the Rapidly Pulsating Subdwarf B Star PG 0911+456
Publication date :
January 2008
Event name :
Third meeting on hot B subdwarfs and related objects
Event organizer :
Dr. Karl Remeis-Sternwarte, Bamberg
Event place :
Bamberg, Germany
Event date :
du 23 au 27 juillet 2007
Audience :
International
Journal title :
Leaflet - Astronomical Society of the Pacific
ISSN :
0004-6272
Publisher :
Astronomical Society of the Pacific, San Francisco, United States - California
Volume :
392
Pages :
309
Peer reviewed :
Peer reviewed
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