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

Journal Article · Mon Jan 01 00:00:00 EST 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/185621· OSTI ID:6904956

Stothers, R B; Chin, Chaowen ^[1]

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1. NASA, Goddard Institute for Space Studies, New York, NY (USA)

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. 47 refs.

• OSTI ID: 6904956
• Journal Information: Astrophysical Journal; (USA), Vol. 348; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
MAIN SEQUENCE STARS
CONVECTION
ADIABATIC PROCESSES
BINARY STARS
COMPARATIVE EVALUATIONS
LIMITING VALUES
LUMINOSITY
MASS
MORPHOLOGY
SCHWARZSCHILD METRIC
STAR EVOLUTION
STAR MODELS
ENERGY TRANSFER
HEAT TRANSFER
MASS TRANSFER
MATHEMATICAL MODELS
METRICS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
STARS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources