Static stellar models with helium cores. II. Linear series of a 7 M sun star with varying helium core mass.
Abstract
Numerical computations were carried out for a linear series of steadystate models of a 7 M_{☉} star consisting of a hydrogenrich envelope and a pure helium core of varying mass. The linear series starts at the hydrogen main sequence and terminates at the helium main sequence. Eleven branches of solutions were encountered, with a maximum of seven simultaneous solutions of the stellar structure equations for a model of given mass and chemical composition. By discussing core and envelope structures separately in the UV diagram, the physical causes of the various solution branches could be elucidated.
 Publication:

Astronomy and Astrophysics
 Pub Date:
 June 1978
 Bibcode:
 1978A&A....66..367L
 Keywords:

 Stellar Models;
 Stellar Structure;
 Electron Gas;
 Helium;
 HertzsprungRussell Diagram;
 Mathematical Models;
 Stellar Luminosity;
 Stellar Temperature;
 Astrophysics;
 Evolution:Stellar Interiors;
 Stellar Envelopes:Structure;
 Stellar Structure: Models