Evolution of stars with two shell sources - The second loop in the H-R-diagram

Details Evolution of stars with two shell sources - The second loop in the H-R-diagram Evolution of stars with two shell sources - The second loop in the H-R-diagram

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....63..391h&link_type=abstract

Astronomy and Astrophysics, vol. 63, no. 3, Feb. 1978, p. 391-399.

Astronomy and Astrophysics

Astrophysics

6

Helium, Hertzsprung-Russell Diagram, Stellar Envelopes, Stellar Evolution, Astrophysics, Hydrogen, Stellar Luminosity, Stellar Models

Scientific paper

A model evolving through the second loop during He-shell source burning can be divided into two basic regions which are treated separately: a contracting C-O core and an envelope with two shell sources which is close to an equilibrium structure. Sequences of such envelopes for a 9-solar-mass star are presented, and it is shown how they interact with a contracting core to form a loop in the H-R diagram. Conditions for the occurrence of this evolution are given.

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