Whole Earth Telescope observations of the subdwarf B star KPD1930+2752: A rich, short-period pulsator in a close binary

Mike D. Reed,Shani L. Harms,Shawn D. Poindexter,Aiying Zhou,Joesph R. Eggen,Melissa A. Morris,A. C. Quint,S. Mcdaniel,Andrzej S. Baran,Noël Dolez,Steven D. Kawaler,Donald W. Kurtz,Paweł A. Moskalik,Reed L. Riddle,Stanislaw Zoła,Roy H. Østensen,Jan Erik Solheim,S. O. Kepler,Andrea F Murillo Costa,Judi L. Provençal,Fergal R. Mullally,D. W. Winget,Maja Vučković,Richard A. Crowe,David B. Terry,R. Avila,Ben C. Berkey,Susan G. Stewart,Julia G. Bodnarik,D. Bolton,Philippe M. Binder,Kazuhiro Sekiguchi,Denis J. Sullivan,Seunglee Kim,Wenping Chen,Chinwei Chen,Hungchin Lin,X. J. Jian,Hong Wu,J. P. Gou,Zhong Liu,Elia M. Leibowitz,Yiftah M. Lipkin,C. Akan,Ömür Çakirli,Rimvydas Janulis,R. Pretorius,Waldemar Ogłoza,Greg S. Stachowski,Margit Paparó,Róbert Szabó,Zoltán Csubry,D. Zsuffa,Roberto Silvotti,Silvia Marinoni,Ivan Bruni,Gérard P. Vauclair,M. Chevreton,Jaymie M. Matthews,Christine A. Cameron,Herbert Pablo

Monthly Notices of the Royal Astronomical Society（2011）

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摘要

KPD 1930+2752 is a short-period pulsating subdwarf B (sdB) star. It is also an ellipsoidal variable with a known binary period of 2.3 h. The companion is most likely a white dwarf and the total mass of the system is close to the Chandresekhar limit. In this paper, we report the results of Whole Earth Telescope (WET) photometric observations during 2003 and a smaller multisite campaign of 2002. Fro...

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关键词

binaries: close,stars: general,stars: oscillations,subdwarfs,oscillations: individual: KPD 1930+2752

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