Pulsations in Subdwarf B Stars

Details Pulsations in Subdwarf B Stars Pulsations in Subdwarf B Stars

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005japa...26..261j&link_type=abstract

Journal of Astrophysics and Astronomy, Vol. 26, Issue 2-3, p. 261

Other

Stars: Oscillations, Stars: Variables: Other (Ec14026/Sdbv), Stars: Individual: Kpd2109 +4401, Pb8783, Pg1605 +072, Hs0039 +4302, Pg0014 +067

Scientific paper

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 with ultracam.

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