2010MNRAS.409.1509K


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.06CET01:19:07

2010MNRAS.409.1509K - Mon. Not. R. Astron. Soc., 409, 1509-1517 (2010/December-3)

First Kepler results on compact pulsators – V. Slowly pulsating subdwarf B stars in short-period binaries.

KAWALER S.D., REED M.D., OSTENSEN R.H., BLOEMEN S., KURTZ D.W., QUINT A.C., SILVOTTI R., BARAN A.S., GREEN E.M., CHARPINET S., TELTING J., AERTS C., HANDLER G., KJELDSEN H., CHRISTENSEN-DALSGAARD J., BORUCKI W.J. and KOCH D.G.

Abstract (from CDS):

The survey phase of the Kepler Mission includes a number of hot subdwarf B (sdB) stars to search for non-radial pulsations. We present our analysis of two sdB stars that are found to be g-mode pulsators of the V1093 Her class. These two stars also display the distinct irradiation effect typical of sdB stars with a close M-dwarf companion with orbital periods of less than half a day. Because the orbital period is so short, the stars should be in synchronous rotation, and if so, the rotation period should imprint itself on the multiplet structure of the pulsations. However, we do not find clear evidence for such rotational splitting. Though the stars do show some frequency spacings that are consistent with synchronous rotation, they also display multiplets with splittings that are much smaller. Longer-duration time series photometry will be needed to determine if those small splittings are in fact rotational splitting, or caused by slow amplitude or phase modulation. Further data should also improve the signal-to-noise ratio, perhaps revealing lower-amplitude periodicities that could confirm the expectation of synchronous rotation. The pulsation periods seen in these stars show period spacings that are suggestive of high-overtone g-mode pulsations.

Abstract Copyright: 2010 The Authors. Journal compilation2010 RAS

Journal keyword(s): stars: binaries: close - stars: oscillations - subdwarfs - stars: variables: general

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HE 0230-4323 HS* 02 32 54.6776909015 -43 10 27.797963721     13.78     sdB 25 0
2 Feige 48 HS* 11 47 14.4977747924 +61 15 31.790488292   13.12 13.28     sdB 111 0
3 V* GW Vir WD* 12 01 45.9728868857 -03 45 40.627851273   14.87 15.04     DOQZ1 468 0
4 V* NY Vir HS* 13 38 48.1466489725 -02 01 49.209465866   13.43 13.66 13.75   sdB1VIIHe1 197 1
5 PG 1338+481 HS* 13 40 08.8343398918 +47 51 51.854284817   13.33 13.588     sdB 33 0
6 PG 1627+017 HS* 16 29 35.3015296881 +01 38 18.794470062   11.32       sdB3VIIHe3 40 0
7 KIC 10670103 HS* 19 34 39.9403831100 +47 58 11.534601872           sdB 21 1
8 V* IR Peg WD* 21 34 08.2124719240 +06 50 57.662044329   16.15       PG1159 113 0

    Equat.    Gal    SGal    Ecl

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2021.03.06-01:19:07

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