Publication Abstracts
Stothers and Simon 1969
, and N.R. Simon, 1969: An explanation for the blue sequence of variable stars. Astrophys. J., 157, 673-681, doi:10.1086/150105.
Nuclear energy of the stellar core is found to be the direct source of energy fed into radial pulsations in two classes of blue variable stars. The μ-mechanism (reversal of the gradient of mean molecular weight, which reduces the central condensation) or the β-mechanism (high radiation pressure) can explain the basic variability of β Cephei stars if they are burning hydrogen in their cores, have accreted a helium-rich envelope, and are the luminous secondaries of close binary systems. If the composition reversal does not lead to significant mixing in the envelope, the μ-mechanism will operate in inhomogeneous stars of 6-95 M☉. If rapid mixing takes place, the β-mechanism will operate in completely homogeneous stars of 12-60 M☉. The β-mechanism can also explain the variability of many Wolf-Rayet stars if they are burning helium in their cores, have masses in excess of ∼8 M☉ with a thin or absent hydrogen envelope, and are the luminous primaries of close binary systems.
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BibTeX Citation
@article{st07410e, author={Stothers, R. and Simon, N. R.}, title={An explanation for the blue sequence of variable stars}, year={1969}, journal={Astrophysical Journal}, volume={157}, pages={673--681}, doi={10.1086/150105}, }
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RIS Citation
TY - JOUR ID - st07410e AU - Stothers, R. AU - Simon, N. R. PY - 1969 TI - An explanation for the blue sequence of variable stars JA - Astrophys. J. JO - Astrophysical Journal VL - 157 SP - 673 EP - 681 DO - 10.1086/150105 ER -
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