Nonlinear radial pulsations for hot 20-M{sun} models

Details Nonlinear radial pulsations for hot 20-M{sun} models Nonlinear radial pulsations for hot 20-M{sun} models

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..310..453a&link_type=abstract

Variable Stars in the Local Group, IAU Colloquium 193, Proceedings of the conference held 6-11 July, 2003 at Christchurch, New Z

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present the results of calculations that predict a radial pulsation instability region for hot 20 Solar mass stars within a narrow band around Teff = 22,000 K. These models have exhausted core hydrogen and are undergoing shell hydrogen burning, and have luminosities similar to the most massive β Cephei stars, but are slightly cooler and more evolved. The pulsations grow to a radial velocity amplitude of ~20 kms-1 with a period of ~0.75d. The amplitude increases for higher Z and lower Y models.

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