Paper:	Nonlinear Radial Pulsations for Hot 20-MSolar models
Volume:	310, Variable Stars in the Local Group (IAU Colloquium 193)
Page:	453
Authors:	Austin, B.A.; Guzik, J.A.; Despain, K.M.; Templeton, M.R.
Abstract:	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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