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2012MNRAS.427.1245R - Mon. Not. R. Astron. Soc., 427, 1245-1251 (2012/December-1)
The discovery of two pulsating subdwarf B stars in NGC 6791 using Kepler data.
REED M.D., BARAN A., OSTENSEN R.H., TELTING J. and O'TOOLE S.J.
Abstract (from CDS):
We detect four periodicities between 0.9 and 2.4h in B3 above a detection limit of 0.53 parts per thousand (ppt) and nine periodicities between 1.1 and 2.2h in B5 above a detection limit of 0.37ppt. No pulsations were detected in B6 to the detection threshold of 0.29ppt. The long-cadence data were less useful as few observations are obtained per pulsation period, yet they do indicate that the pulsations are variable from month to month. The spacings between the pulsation periods are similar to other g-mode pulsating sdB stars observed by Kepler, indicating that the periodicities can be associated witquals; 1 modes. A fit to the periods give spacings of 234.6±0.6 and 242.6±1.5s for B3 and B5, respectively.
Abstract Copyright: © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS
Journal keyword(s): stars: oscillations - subdwarfs
Simbad objects: 9
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