Abstract
Effective temperatures of O-type stars imbedded in diffuse nebulae are derived from measurements of Ha and radio fluxes from the nebulae and the apparent magnitudes of the stars. Accurate model atmospheres, with ultraviolet line blanketing where appropriate, are used for the theoretical relation between effective temperature and the ratio of Lyman continuum to visual stellar fluxes. Although there is considerable scatter in the results, an average temperature of 48000 K is found for spectral type O5, 40000 K for O6, and 35000 K for O7.
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Morton, D.C. (1970). The Effective Temperatures of the O Stars. In: Houziaux, L., Butler, H.E. (eds) Ultraviolet Stellar Spectra and Related Ground-Based Observations. International Astronomical Union / Union Astronomique Internationale, vol 36. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-3293-3_12
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DOI: https://doi.org/10.1007/978-94-010-3293-3_12
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