Title

Mode identification in the pulsating subdwarf B star KIC 2697388

Abstract

We present our results on mode identification in the pulsating subdwarf B star KIC 2697388 observed with the Kepler spacecraft. We detected 148 frequencies of which five were attributed to p-modes while 122, to g-modes. The remaining 21 frequencies are also likely g-modes. We used multiplets and asymptotic period spacing to constrain degrees of 89 peaks to either / = 1 or 2. Using splittings in multiplets we derived the rotation period of this star to be nearly 45 days. The average period spacing between / = 1 and 2 overtones are nearly 240 s and 139 s, respectively. Our results show that combining tentative identification based on the presence of multiplets and asymptotic period spacing is indeed useful in mode identification. Mode degree consistently inferred from independent methods make the results reliable and will help to construct accurate models of subdwarf B stars.

Department(s)

Physics, Astronomy, and Materials Science

Document Type

Article

Keywords

Asteroseismology, Stars: Oscillations -, Subdwarfs -

Publication Date

9-3-2012

Journal Title

Acta Astronomica

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