Origin and pulsation of hot subdwarfs. Issue Volume 9:Issue S301(2013) (18th February 2014)

• Record Type: Journal Article
• Authors: Randall, S. K.; Fontaine, G.; Charpinet, S.; Van Grootel, V.; Brassard, P.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 9:Issue S301(2013)
• Page Start: 289
• Page End: 296
• Publication Date: 2014-02-18
• Subjects: stars: oscillations, -- subdwarfs; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921313014476
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: We briefly introduce hot subdwarfs and their evolutionary status before discussing the different types of known pulsators in more detail. Currently, at least six apparently distinct types of variable are known among hot subdwarfs, encompassing p- as well as g-mode pulsators and objects in the Galactic field as well as in globular clusters. Most of the oscillations detected can be explained in terms of an iron opacity mechanism, and quantitative asteroseismology has been very successful for some of the pulsators. In addition to helping constrain possible evolutionary scenarios, studies focussing on stellar pulsations have also been used to infer planets and characterize the rotation of the host star.