Structure and Evolution of Medium-Mass Stars. I. Main-Sequence Model of 2.5 Solar Masses.

Abstract

view Abstract Citations (3) References (7) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Structure and Evolution of Medium-Mass Stars. I. Main-Sequence Model of 2.5 Solar Masses. Bahng, J. Abstract The initial main-sequence model of a star of 2.5 solar masses was constructed with the following refinements: (1) New interpolation formulae for the nuclear-energy generation were derived: one for the p-p reaction, another for the C-N reaction. (2) Both the formulae were used together in computing the energy-generation rate, thereby taking into account the contributions of both reactions to the luminosity of the star. (3) The energy generation in the radiative zone outside the inner convective core was included. In this model approximately 6 per cent of the total luminosity is due to the energy produced in the radiative envelope. The over-all structure differs very little from that of a model computed on the assumption that the total luminosity of the star is entirely due to the energy generation confined completely within the convective core. The non-negligible energy production, and therefore subsequent composition changes in the outer radiative zone, may, however, have an appreciable influence on the structure of a star in the evolved stages. Publication: The Astrophysical Journal Pub Date: October 1964 DOI: 10.1086/148003 Bibcode: 1964ApJ...140.1041B full text sources ADS | Related Materials (2) Part 2: 1965ApJ...142..164P Part 3: 1965ApJ...142..170A