Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...105...85r&link_type=abstract
Astronomy and Astrophysics, vol. 105, no. 1, Jan. 1982, p. 85-97.
Astronomy and Astrophysics
Astronomy
76
Atmospheric Models, B Stars, O Stars, Stellar Atmospheres, Stellar Luminosity, Stellar Temperature, Early Stars, Radii, Stellar Magnitude, Stellar Spectra, Supergiant Stars, Ultraviolet Astronomy
Scientific paper
Integrated total flux and the IR flux are used by the method of Blackwell and Shallis (1977) to derive effective temperatures and angular diameters for 37 early-type stars which range in spectral type from O8 to B2, cover the luminosity classes Ia-V, and include Zeta Pup (O4 If). It is found that: (1) the observed flux distribution for supergiants does not agree with line-blanketed model atmosphere predictions; (2) the observed flux at wavelengths lower than 2000 A is smaller than predicted; and (3) the Balmer jump is smaller than predicted. The temperatures derived, to an accuracy of 1000-1500 K, are 1500 K smaller than those derived in an analogous way by Underhill et al (1979), and angular diameters are found to be in agreement with those from interferometric data.
Lamers Henny J. G. L. M.
Remie H.
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