Excitation of the pulsation in the helium star V 652 HER

Details Excitation of the pulsation in the helium star V 652 HER Excitation of the pulsation in the helium star V 652 HER

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.260..465s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 260, no. 3, p. 465-467.

Physics

31

B Stars, Stellar Oscillations, Stellar Physics, Opacity, Peculiar Stars, Stellar Composition, Variable Stars

Scientific paper

The excitation of radial pulsations in the hot extreme helium star V652 Her is investigated by using new opacity tables given by Rogers and Iglesias. Unlike previous attempts using old opacities, it is found that the kappa mechanism caused by an opacity bump located where the temperature is about 2 x 1.0 exp 5 K is strong enough to excite the fundamental radial pulsations in V652 Her. It is suggested that the iron abundance of V652 Her should be similar to the solar value.

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