Publication Abstracts
Stothers 1976
, 1976: Excitation of pulsations in the CNO ionization zone of luminous stars. Astrophys. J., 204, 853-868, doi:10.1086/154234.
Homogeneous models of luminous hydrogen-and-helium burning stars were constructed on the basis of Carson's new radiative opacities. These opacities exhibit a large 'bump' at moderate temperatures and low densities as a result of the ultimate ionization of the CNO group of elements and they induce in the envelopes of the more massive stars a strong local convection zone, a high central condensation and pulsational instability by means of the kappa-mechanism above a certain stellar mass. This critical mass for Population I hydrogen-burning stars is probably greater than 45 solar masses for the fundamental radial mode, with the overtones being more stable, while for the homogeneous helium-burning stars, the critical mass lies in the range 2-6 solar masses for all modes up to at least the third overtone. Convection is alternately treated by means of the mixing length theory and the assumption of strict adiabaticity.
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BibTeX Citation
@article{st07300k, author={Stothers, R.}, title={Excitation of pulsations in the CNO ionization zone of luminous stars}, year={1976}, journal={Astrophysical Journal}, volume={204}, pages={853--868}, doi={10.1086/154234}, }
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RIS Citation
TY - JOUR ID - st07300k AU - Stothers, R. PY - 1976 TI - Excitation of pulsations in the CNO ionization zone of luminous stars JA - Astrophys. J. JO - Astrophysical Journal VL - 204 SP - 853 EP - 868 DO - 10.1086/154234 ER -
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