Condition for the Existence of Convective Cores in Main Sequence Stars

• Tipo: Tese
• Data: 1990

Autores

Mário João P. F. G. Monteiro (Autor) FCUP

Classificação Científica

FOS: Ciências exactas e naturais > Física

CORDIS: Ciências Físicas > Astronomia ; Ciências Físicas > Astronomia > Astrofísica

Instituições Associadas

ULOND - University of London

Outras Informações

Resumo (PT): The aim of this work is to find the condition for the existence of convective cores in homogenous main sequence stars where the opacity per unit mass is k=k_0ρ^α T^-β and the energy generation rate per unit mass is ɛ=ɛ_0ρT^η (ρ and T being the density and the temperature, respectively). Numerical models of stars with different values of α, β and η are constructed and the condition for the existence of a convective core in terms of the relation between α, β and η determined. Forty points η=η(α,β) are determined for αin[0,2] and βin[0,4] and the condition is found to be η = - 3.3294 α + 2.0243 β + 1.8393

Abstract (EN): The aim of this work is to find the condition for the existence of convective cores in homogenous main sequence stars where the opacity per unit mass is k=k_0ρ^α T^-β and the energy generation rate per unit mass is ɛ=ɛ_0ρT^η (ρ and T being the density and the temperature, respectively). Numerical models of stars with different values of α, β and η are constructed and the condition for the existence of a convective core in terms of the relation between α, β and η determined. Forty points η=η(α,β) are determined for αin[0,2] and βin[0,4] and the condition is found to be η = - 3.3294 α + 2.0243 β + 1.8393

Idioma: Português

Tipo (Avaliação Docente): Científica

Notas: Orientador: Ian W. Roxburgh

Nº de páginas: 50