Pulsations in hot subdwarf stars: Recent advances and prospects for testing stellar physics

Stéphane Charpinet, V. Van Grootel, G. Fontaine, P. Brassard, S. K. Randall, E. M. Green

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The evolved, core helium burning, extreme horizontal branch stars (also known as hot B subdwarfs) host several classes of pulsators showing either p- or g-modes, or both. They offer particularly favorable conditions for probing with asteroseismology their internal structure, thus constituting arguably the most interesting seismic window for this intermediate stage of stellar evolution. G-modes in particular have the power to probe deep inside these stars, down to the convective He-burning core boundary where uncertain physics (convection, overshooting, semi-convection) is at work. Space data recently obtained with CoRoT and Kepler are offering us the possibility to probe these regions in detail and possibly shed new light on how these processes shape the core structure. In this short paper, we present the most recent advances that have taken place in this field and we provide hints of the foreseen future achievements of hot subdwarf asteroseismology.

Original languageEnglish (US)
Pages (from-to)581-588
Number of pages8
JournalProceedings of the International Astronomical Union
Volume11
Issue numberA29B
DOIs
StatePublished - 2015
Externally publishedYes

Keywords

  • stars : oscillations
  • subdwarfs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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