The gravo-thermal catastrophe and stellar evolution

Details The gravo-thermal catastrophe and stellar evolution The gravo-thermal catastrophe and stellar evolution

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...102..109b&link_type=abstract

Astronomy and Astrophysics, vol. 102, no. 1, Sept. 1981, p. 109-115. NATO-supported research; Consiglio Nazionale delle Ricerch

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Catastrophe Theory, Gravitational Collapse, Stellar Evolution, Stellar Temperature, Thermodynamic Equilibrium, Equations Of State, Isothermal Processes, Nuclear Energy, Systems Stability

Scientific paper

Lynden-Bell and Wood's (1968) stability discussion of the classical isothermal gas sphere is extended to isothermal structures which obey a realistic stellar equation of state. The analysis offers a theoretical framework for the interpretation of a series of numerical experiments on stellar evolution which are performed by suppressing the nuclear energy generation. A gravo-thermal catastrophe appears in the later evolutionary stages when the mass of the model exceeds the Chandrasekhar limit, and it is confirmed that the standard red giant phase cannot be interpreted by a mechanism such as the one proposed by Lynden-Bell and Wood.

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