Deciphering the period spacing pattern in the oscillation spectrum of the SPB star KIC 7760680
Astronomical Institute of the Wroclaw University, Kopernika 11, 51-622 Wrocław, Poland
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Published online: 27 October 2017
We present the analysis of KIC 7760680, the rotating Slowly Pulsating B–type star identified in the Kepler photometry. The oscillation spectrum of the star exhibits a series of 36 frequencies which are quasi-equally spaced in period. We confirm that this series can be associated with prograde dipole modes of consecutive radial orders. In our studies, the effects of rotation were included in the MESA equilibrium models as well as in the puslational calculations in the framework of the traditional approximation. We find that pulsational models computed with the OPLIB opacities best reproduce the observed frequency range. The modified opacity data with an enhancement of the opacity at log T = 5.3, 5.46 and 5.06 were tested as well. Increasing the OPLIB opacities by about 50% at log T = 5.3 is sufficient to excite modes in the whole range of 36 frequency peaks of KIC 7760680.
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