Why red giants are giant

Details Why red giants are giant Why red giants are giant

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.236..505w&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 236, Jan. 15, 1989, p. 505-544.

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Computation

15

Computational Astrophysics, Red Giant Stars, Stellar Evolution, Stellar Structure, Gravitational Fields, Helium, Hydrogen, Stellar Cores, Stellar Envelopes

Scientific paper

Four primary causes for the giantness of red giants are identified: (1) the opacity law in the lower envelope; (2) the abrupt molecular weight change across the shell; (3) convection or electron degeneracy in hydrogen-exhausted cores above a certain mass; and (4) approximate thermostatic control of the core by simultaneous hydrogen and helium burning. None of the four is shown to be hierarchically more important in giant formation. It is noted that the details of nuclear energy release are of secondary importance in determining the overall structure of giants.

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