Publication Abstracts

Stothers 1970

Stothers, R., 1970: Internal structure of upper main-sequence stars. Mon. Not. Roy. Astron. Soc., 151, 65-80.

In main-sequence stars heavier than 9 M, convective instability develops just outside the zero-age convective core as hydrogen depletion proceeds. At least ten schemes are available in the literature to treat the unstable intermediate zone which results. A detailed investigation is presented here, utilizing physical, laboratory, stellar-model, and observational considerations. Only two schemes survive, both of which are semiconvective: the modified Schwarzschild-Harm (SH) piescription and the modified Ledoux-Sakashita- Hayashi (LSH) prescription. The former scheme is tentatively favoured by the weight of laboratory evidence. In either case, the earliest stages of hydrogen depletion are characterized by a semiconvective zone which joins continuously the convective core and the outer radiative envelope. The later stages are characterized by a radiative detachment of the serniconvective zone from the core, except for masses above 15 M in the SH scheme. At any given mass, the final hydrogen profiles resulting from each of the two schemes are very similar.

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BibTeX Citation

@article{st01610j,
  author={Stothers, R.},
  title={Internal structure of upper main-sequence stars},
  year={1970},
  journal={Mon. Not. Roy. Astron. Soc.},
  volume={151},
  pages={65--80},
}

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RIS Citation

TY  - JOUR
ID  - st01610j
AU  - Stothers, R.
PY  - 1970
TI  - Internal structure of upper main-sequence stars
JA  - Mon. Not. Roy. Astron. Soc.
VL  - 151
SP  - 65
EP  - 80
ER  -

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