Stellar rotation rates in Kepler eccentric (heartbeat) binaries obtained from r-mode signatures

  title={Stellar rotation rates in Kepler eccentric (heartbeat) binaries obtained from r-mode signatures},
  author={Hideyuki Saio and Donald W. Kurtz},
R-mode oscillations in a rotating star produce characteristic signatures in a Fourier amplitude spectrum at frequencies related with the rotation frequency, which can be, in turn, used to obtain the surface rotation rate of the star. Some binary stars observed by Kepler indicate the presence of r modes that are probably excited by the tidal effect. In this paper, we have obtained stellar rotation periods in 20 eccentric (heartbeat) binaries with r-mode signatures. The majority of the rotation… 



binary with an orbital eccentricity

  • 2012

APPENDIX A: OTHER HEARTBEAT STARS FITTED WITH R MODES A1 KIC 4372379 KIC 4372379 is a short period (Porb = 4.535 d; KEBC) heartbeat

  • 2017

2016), which yields the pseudo-synchronous

  • 2016

The orbital period of KIC

  • d. Fig. A2 (lower panel) shows an FT for KIC
  • 2020

2016) obtained an orbital eccentricity

  • 2016

0.1mmag) of the frequency group

  • 2020

2016) obtained the eccentricity e = 0.363

  • 2016

Ppsβˆ’rot = 2.502 d, which is comparable to the rotation period 2.33 d that corresponds to the assumed rotation frequency frot

  • 2020

2017) obtained a still longer rotation period

  • 2017

FTs for KIC 8719324; the upper panel includes orbital harmonics, which are removed in the lower panel. The cyan line denotes harmonics and combination frequencies of the highest peaks

  • 1932