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Whole Earth Telescope Observations of the subdwarf B star KPD 1930+2752: A rich, short period pulsator in a close binary
M. D. Reed, S. L. Harms, S. Poindexter +58
KPD 1930+2752 is a short-period pulsating subdwarf B (sdB) star. It is also an ellipsoidal variable with a known binary period just over two hours. The companion is most likely a w…
First Kepler results on compact pulsators I. Survey target selection and the first pulsators
R. H. Østensen, R. Silvotti, S. Charpinet +25
We present results from the first two quarters of a survey to search for pulsations in compact stellar objects with the Kepler spacecraft. The survey sample and the various methods…
2M1938+4603: A rich, multimode pulsating sdB star with an eclipsing dM companion observed with Kepler
R. H. Østensen, E. M. Green, S. Bloemen +16
2M1938+4603 (KIC 9472174) displays a spectacular light curve dominated by a strong reflection effect and rather shallow, grazing eclipses. The orbital period is 0.126 days, the sec…
Detection of frequency spacings in the young O-type binary HD 46149 from CoRoT photometry
P. Degroote, M. Briquet, M. Auvergne +15
Using the CoRoT space based photometry of the O-type binary HD46149, stellar atmospheric effects related to rotation can be separated from pulsations, because they leave distinct s…
Towards ensemble asteroseismology of the young open clusters Chi Persei and NGC 6910
S. Saesen, A. Pigulski, F. Carrier +71
As a result of the variability survey in Chi Persei and NGC6910, the number of Beta Cep stars that are members of these two open clusters is increased to twenty stars, nine in NGC6…