Studies of hot B subdwarfs. I - Stromgren photometry of the Greenstein-Sargent-sample

Details Studies of hot B subdwarfs. I - Stromgren photometry of the Greenstein-Sargent-sample Studies of hot B subdwarfs. I - Stromgren photometry of the Greenstein-Sargent-sample

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89..374b&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 89, March 1984, p. 374-378. Research supported by the Natural Sciences and Engineeri

Astronomy and Astrophysics

Astronomy

23

B Stars, Hot Stars, Stellar Color, Subdwarf Stars, Astronomical Catalogs, Atmospheric Models, Stellar Atmospheres, Stellar Spectrophotometry, Stellar Temperature

Scientific paper

Strömgren colors for a sample of 25 hot B subdwarfs are presented. These stars form a well-defined sequence in a two-color diagram, the existence of which is shown to be consistent with the evolutionary scenario for sdB stars proposed by Wesemael et al. (1982). A comparison of the photometric data with appropriate model atmosphere calculations suggests that hot B subdwarfs have effective temperatures ranging from 25000K to upward of 40000K, and surface gravities generally above log g = 5.0.

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