SIMBAD references

2018MNRAS.474.5186R - Mon. Not. R. Astron. Soc., 474, 5186-5198 (2018/March-2)

K2 Campaign 5 observations of pulsating subdwarf B stars: binaries and super-Nyquist frequencies.

REED M.D., ARMBRECHT E.L., TELTING J.H., BARAN A.S., OSTENSEN R.H., BLAY P., KVAMMEN A., KUUTMA T., PURSIMO T., KETZER L. and JEFFERY C.S.

Abstract (from CDS):

We report the discovery of three pulsating subdwarf B stars in binary systems observed with the Kepler space telescope during Campaign 5 of K2. EPIC 211696659 (SDSS J083603.98+155216.4) is a g-mode pulsator with a white dwarf companion and a binary period of 3.16 d. EPICs 211823779 (SDSS J082003.35+173914.2) and 211938328 (LB 378) are both p-mode pulsators with main-sequence F companions. The orbit of EPIC 211938328 is long (635 ± 146 d) while we cannot constrain that of EPIC 211823779. The p modes are near the Nyquist frequency and so we investigate ways to discriminate super- from sub-Nyquist frequencies. We search for rotationally induced frequency multiplets and all three stars appear to be slow rotators with EPIC 211696659 subsynchronous to its orbit.

Abstract Copyright: © 2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: oscillations - subdwarfs

Simbad objects: 7

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