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

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. F...

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Bibliographic Details
Published inAdvances in space research Vol. 54; no. 7; pp. 1308 - 1318
Main Authors Antoniou, A., Danezis, E., Lyratzi, E., Popović, L.Č., Stathopoulos, D., Dimitrijević, M.S.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.10.2014
Subjects
C IV resonance lines
Density clouds
Oe stars
Radial velocities
Random velocities
Rotational velocities
C IV resonance lines
Rotational velocities
Random velocities
Oe stars
Density clouds
Radial velocities
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Summary: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 a group of physical parameters, such as the apparent rotational and radial velocities, the random velocities of the thermal motions of the ions, the Full Width at Half Maximum (FWHM), the optical depth, as well as the absorbed energy and the column density of the independent regions of matter, which produce the main and the satellite clouds of the studied spectral lines. Finally, we present the relations between these physical parameters and the spectral subtypes of the studied stars and we give our results about the structure of the C IV region in their atmosphere.
ISSN:0273-1177
1879-1948
DOI:10.1016/j.asr.2013.12.004