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Kepler observations of the beaming binary KPD 1946+4340
S. Bloemen, T. R. Marsh, R. H. Østensen +24
The Kepler Mission has acquired 33.5d of continuous one-minute photometry of KPD 1946+4340, a short-period binary system that consists of an sdB and a white dwarf. In the light cur…
First Kepler results on compact pulsators II: KIC 010139564, a new pulsating subdwarf B (V361 Hya) star with an additional low-frequency mode
Steven D. Kawaler, M. D. Reed, A. C. Quint +13
We present the discovery of nonradial pulsations in a hot subdwarf B star based on 30.5 days of nearly continuous time-series photometry using the \emph{Kepler} spacecraft. KIC 010…
First Kepler results on compact pulsators III: Subdwarf B stars with V1093~Her and hybrid (DW~Lyn) type pulsations
M. D. Reed, S. D. Kawaler, R. H. Ostensen +12
We present the discovery of nonradial pulsations in five hot subdwarf B (sdB) stars based on 27 days of nearly continuous time-series photometry using the Kepler spacecraft. We fin…
First Kepler results on compact pulsators V: Slowly pulsating subdwarf B stars in short-period binaries
S. D. Kawaler, M. D. Reed, R. H. Østensen +15
The survey phase of the Kepler Mission includes a number of hot subdwarf B (sdB) stars to search for nonradial pulsations. We present our analysis of two sdB stars that are found t…
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…
Spin-resolved spectroscopy of the intermediate polar DQ Her
S. Bloemen, T. R. Marsh, D. Steeghs +1
We present high-speed spectroscopic observations of the intermediate polar DQ Herculis. Doppler tomography of two He I lines reveals a spiral density structure in the accretion dis…