Publication Abstracts

Simon 1971

Simon, N.R., 1971: Second-order pulsations in polytropes. Astrophys. J., 164, 331-340, doi:10.1086/150842.

A theory due to Eddington is employed to calculate second-order corrections to the usual linear, quasi-adiabatic pulsational amplitudes. Such corrections are necessary in order to evaluate the pulsational stability of stars in thermal imbalance (dS0/dt ≠ 0). The second-order quantities are calculated, and their properties discussed, for a wide variety of polytropic models. Subsequently, a number of these models are tested for pulsational stability, and the conclusions drawn in an earlier, more preliminary work are re-evaluated on the basis of the results. In particular, it is found that stars in pre-main-sequence contraction are probably stable against pulsations energized via thermal imbalance.

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BibTeX Citation

  author={Simon, N. R.},
  title={Second-order pulsations in polytropes},
  journal={Astrophysical Journal},

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RIS Citation

ID  - si06000k
AU  - Simon, N. R.
PY  - 1971
TI  - Second-order pulsations in polytropes
JA  - Astrophys. J.
JO  - Astrophysical Journal
VL  - 164
SP  - 331
EP  - 340
DO  - 10.1086/150842
ER  -

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