Limit on overshooting from the convective core in upper main-sequence stars

Details Limit on overshooting from the convective core in upper main-sequence stars Limit on overshooting from the convective core in upper main-sequence stars

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...348l..21s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 348, Jan. 1, 1990, p. L21-L24.

Astronomy and Astrophysics

Astrophysics

17

Convective Flow, Main Sequence Stars, Stellar Cores, Stellar Evolution, Schwarzschild Metric, Stellar Interiors, Stellar Models

Scientific paper

Overshooting of convective elements far beyond the classical Schwarzschild convective core boundary in theoretical models of massive ZAMS stars is found to lead to significant reductions of stellar luminosity and radius, provided that the temperature gradient in the overshoot region can be approximated by the adiabatic gradient. Comparison of these theoretical models with binary star data for the range of 5-15 solar masses indicates that the ratio of overshoot distance to pressure scale height is probably less than 1.5. This result apparently excludes any overshooting theories that predict very extended adiabatic convective cores.

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