Observational tests of convective core overshooting in stars of intermediate to high mass in the Galaxy

Details Observational tests of convective core overshooting in stars of intermediate to high mass in the Galaxy Observational tests of convective core overshooting in stars of intermediate to high mass in the Galaxy

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...383..820s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 383, Dec. 20, 1991, p. 820-836.

Astronomy and Astrophysics

Astrophysics

54

Binary Stars, Convection, Milky Way Galaxy, Open Clusters, Stellar Cores, Stellar Mass, Blue Stars, Main Sequence Stars, Red Giant Stars, Stellar Evolution, Stellar Temperature, Supergiant Stars, Wolf-Rayet Stars

Scientific paper

This study presents the results of 14 tests for the presence of convective overshooting in large convecting stellar cores for stars with masses of 4-17 solar masses which are members of detached close binary systems and of open clusters in the Galaxy. A large body of theoretical and observational data is scrutinized and subjected to averaging in order to minimize accidental and systematic errors. A conservative upper limit of d/HP less than 0.4 is found from at least four tests, as well as a tighter upper limit of d/HP less than 0.2 from one good test that is subject to only mild restrictions and is based on the maximum observed effective temperature of evolved blue supergiants. It is concluded that any current uncertainty about the distance scale for these stars is unimportant in conducting the present tests for convective core overshooting. The correct effective temperature scale for the B0.5-B2 stars is almost certainly close to one of the proposed hot scales.

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