Detection of Multiplets of Degree ℓ = 3 and ℓ = 4 in the Subdwarf-B Pulsator KIC10139564
We present up-to-date results on the short-period sdB pulsator in the Kepler field, KIC 10139564, including 27 months of near continuous photometric data. With this extended dataset we significantly lower the detection threshold, which allows us to detect multiplet components that were missing in our previous analysis based on 15 months of data. We conclude that two regions in the amplitude spectrum of KIC 10139564 contain modes of degree ℓ = 3 and ℓ = 4, respectively. We also identify many combination frequencies, in both the sub- and super-Nyquist regions, as well as several pulsation modes which show strong frequency or amplitude variability.
Physics, Astronomy, and Materials Science
Asteroseismology, Stars: Oscillations(including pulsations) -, Subdwarfs -
Baran, A. S., and R. H. Østensen. "Detection of Multiplets of Degree ℓ= 3 and ℓ= 4 in the Subdwarf-B Pulsator KIC 10139564." Acta Astronomica 63, no. 1 (2013): 79-90.