Condition for the Existence of Convective Cores in Main Sequence Stars

• Type: Thesis
• Date: 1990

Authors

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

Scientific classification

FOS: Natural sciences > Physical sciences

CORDIS: Physical sciences > Astronomy ; Physical sciences > Astronomy > Astrophysics

Associated Institutions

ULOND - University of London

Other information

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

Language: Portuguese

Type (Professor's evaluation): Scientific

Notes: Orientador: Ian W. Roxburgh

No. of pages: 50