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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
First Kepler results on compact pulsators - V. Slowly pulsating subdwarf B stars in short-period binaries
Monthly Notices of the Royal Astronomical Society, Volume 409, No. 4, Year 2010
Notification
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Description
The survey phase of the Kepler Mission includes a number of hot subdwarf B (sdB) stars to search for non-radial pulsations. We present our analysis of two sdB stars that are found to be g-mode pulsators of the V1093-Her class. These two stars also display the distinct irradiation effect typical of sdB stars with a close M-dwarf companion with orbital periods of less than half a day. Because the orbital period is so short, the stars should be in synchronous rotation, and if so, the rotation period should imprint itself on the multiplet structure of the pulsations. However, we do not find clear evidence for such rotational splitting. Though the stars do show some frequency spacings that are consistent with synchronous rotation, they also display multiplets with splittings that are much smaller. Longer-duration time series photometry will be needed to determine if those small splittings are in fact rotational splitting, or caused by slow amplitude or phase modulation. Further data should also improve the signal-to-noise ratio, perhaps revealing lower-amplitude periodicities that could confirm the expectation of synchronous rotation. The pulsation periods seen in these stars show period spacings that are suggestive of high-overtone g-mode pulsations. © 2010 The Authors. Journal compilation © 2010 RAS.
Authors & Co-Authors
Kawaler, Steven D.
United States, Ames
Iowa State University
Reed, Michael D.
United States, Springfield
Missouri State University
Østensen, Roy H.
Belgium, Leuven
Ku Leuven
Bloemen, Steven
Belgium, Leuven
Ku Leuven
Kurtz, Donald W.
United Kingdom, Preston
University of Central Lancashire
Quint, A. C.
United States, Springfield
Missouri State University
Silvotti, Roberto
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Baran, Andrzej S.
United States, Ames
Iowa State University
Poland, Krakow
Uniwersytet Pedagogiczny Im. Komisji Edukacji Narodowej
Green, Elizabeth M.
United States, Tucson
The University of Arizona
Charpinet, Stéphane
France, Paris
Cnrs Centre National de la Recherche Scientifique
Telting, John H.
Spain, Brena Baja
Nordic Optical Telescope
Aerts, Conny
Belgium, Leuven
Ku Leuven
Handler, Gerald
Austria, Vienna
Universität Wien
Kjeldsen, Henrik
Denmark, Aarhus
Aarhus Universitet
Christensen-Dalsgaard, Joergen
Denmark, Aarhus
Aarhus Universitet
Borucki, William J.
United States, Washington, D.c.
National Aeronautics and Space Administration
Koch, David G.
United States, Washington, D.c.
National Aeronautics and Space Administration
Statistics
Citations: 33
Authors: 17
Affiliations: 12
Identifiers
Doi:
10.1111/j.1365-2966.2010.17475.x
ISSN:
00358711
Study Design
Cross Sectional Study
Study Approach
Quantitative