Secular Stability - Coupling of Thermal and Nuclear-Chemical Variables - the Role of the Equation of State

Details Secular Stability - Coupling of Thermal and Nuclear-Chemical Variables - the Role of the Equation of State Secular Stability - Coupling of Thermal and Nuclear-Chemical Variables - the Role of the Equation of State

May 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..76...49l&link_type=abstract

Astrophysics and Space Science, Volume 76, Issue 1, pp.49-60

Astronomy and Astrophysics

Astrophysics

Scientific paper

A re-investigation of the secular problem is presented taking into account perturbations of chemical abundances. In particular the role of the equation of state is exposed. It is shown, in the frame of an analytical one-zone model, that an evolutionary instability results from the coupling of thermal and nuclear-chemical variables. Strong arguments indicate that the secular behaviour of a star (in the hydrogen burning phase) is represented by the thermal spectrum joined with the ‘Continuous Nuclear Spectrum’. The existence of an additional discrete (unstable) nuclear spectrum is called in question.

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