Journal of Astrophysics and Astronomy

, Volume 26, Issue 2–3, pp 261–271 | Cite as

Pulsations in subdwarf B stars

  • C. Simon Jeffery


Subdwarf B stars play a significant role in close binary evolution and in the hot star content of old stellar populations, in particular in giant elliptical galaxies. While the question of their origin poses several problems for stellar evolution theory, one of their most fascinating properties is the presence of multi-periodic 2–3 minute oscillations. Interpreting these oscillations optimally requires the correct identification of the modes. Partial identifications can be obtained using high-speed observations of radial velocity and colour variations. We review some of the several attempts to make such observations, most recently with the Multi-Site Spectroscopic Telescope campaign and withULTRACAM.

Key words

Stars: oscillations stars: variables: other (EC14026/sdBV) stars: individual: KPD2109+4401, PB8783, PG1605+072, HS0039+4302, PG0014+067 


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Copyright information

© Indian Academy of Sciences 2005

Authors and Affiliations

  • C. Simon Jeffery
    • 1
  1. 1.Armagh ObservatoryArmaghNorthern Ireland

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