Study on the properties of the blue loops

Details Study on the properties of the blue loops Study on the properties of the blue loops

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003acasn..44..103z&link_type=abstract

Acta Astronomica Sinica, vol. 44, no. 2, p. 103-109

Astronomy and Astrophysics

Astronomy

1

Stars: Hr And C-M Diagrams

Scientific paper

The main factors which affecting the formation and extension of the blue loops of the middle mass stars are studied and the correlation between the feature of blue loops and the variation of the total energy production rate of the star during the core He-burning is found. The variation of the total energy production rate is mainly contributed by the H-burning shell and the core He--burning, the H-burning shell is dependent, however, on the temperature and the hydrogen profile in the ?-gradient region and the inward penetration of the outer convective zone. Both of the size of the He core and the temperature in the region of the He core determine the core He--burning which not only contributes to the total energy production rate, but also has influence on the H-burning shell.

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