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The effective temperatures of O-type stars from UV spectroscopy

Bianchi, Luciana; Garcia, Miriam

We present an analysis of high resolution spectra in the far-UV - UV range (∼905-2000 Å) with non-LTE, spherical, hydrodynamical, line-blanketed models, of three O-type Galactic stars, and derive their photospheric and wind parameters. These data extend previously analyzed samples and fill a gap in spectral type coverage. The combined sample confi…

A statistical study of C IV regions in 20 Oe-stars

Popović, L. Č.; Antoniou, A.; Stathopoulos, D. +3 more

In this paper, using the Gauss-Rotation model (GR model), we analyse the UV C IV resonance lines in the spectra of 20 Oe-stars of different spectral subtypes, in order to detect the structure of C IV region. We study the presence and behavior of absorption clouds and analyse their characteristics. From this analysis we can calculate the values of …