Publication Abstracts

Stothers 1976

Stothers, R., 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.

Export citation: [ BibTeX ] [ RIS ]

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},
}

[ Close ]

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  -

[ Close ]

• Return to 1976 Publications

• Return to Publications Homepage