Hot subdwarf stars, including helium core burning subdwarf B (sdB) stars and more evolved subdwarf O (sdO) stars, host three classes of nonradial pulsators. Two of them show rapid acoustic mode oscillations (with periods in the 60–600 s range), while the third class features slow gravity mode vibrations of period typically 1h. All three classes provide a strong potential for sounding the internal properties of stars in these evolved phases of stellar evolution through asteroseismology. This has so far been exploited mainly for the rapid p‐mode sdB pulsators, but the long period g‐mode sdB pulsators, with the advent of space observations, carry good promises for sounding even deeper regions inside these stars. In this review paper, we summarize the properties of pulsating hot subdwarf stars and we outline progress that have recently occured in the asteroseismic exploitation of the pulsations observed in sdB stars.
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16 September 2009
STELLAR PULSATION: CHALLENGES FOR THEORY AND OBSERVATION: Proceedings of the International Conference
31 May–5 June 2009
Santa Fe, New Mexico (USA)
Research Article|
September 16 2009
Progress in Sounding the Interior of Pulsating Hot Subdwarf Stars
S. Charpinet;
S. Charpinet
aLaboratoire d’Astrophysique de Toulouse‐Tarbes, Université de Toulouse, CNRS, 14 av. E. Belin, 31400 Toulouse, France
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P. Brassard;
P. Brassard
bUniversité de Montréal, C.P. 6128, Succ. Centre‐Ville, Montréal, QC H3C 3J7, Canada
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G. Fontaine;
G. Fontaine
bUniversité de Montréal, C.P. 6128, Succ. Centre‐Ville, Montréal, QC H3C 3J7, Canada
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E. M. Green;
E. M. Green
cSteward Observatory, University of Arizona, 933 North Cherry Ave., Tucson, AZ 85721
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V. Van Grootel;
V. Van Grootel
aLaboratoire d’Astrophysique de Toulouse‐Tarbes, Université de Toulouse, CNRS, 14 av. E. Belin, 31400 Toulouse, France
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S. K. Randall;
S. K. Randall
dESO, Karl‐Schwarzschild‐Str. 2, 85748 Garching bei Munchen, Germany
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P. Chayer
P. Chayer
eSpace Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
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AIP Conf. Proc. 1170, 585–596 (2009)
Citation
S. Charpinet, P. Brassard, G. Fontaine, E. M. Green, V. Van Grootel, S. K. Randall, P. Chayer; Progress in Sounding the Interior of Pulsating Hot Subdwarf Stars. AIP Conf. Proc. 16 September 2009; 1170 (1): 585–596. https://doi.org/10.1063/1.3246567
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