Physics
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...4e...7a&link_type=abstract
The Ultraviolet Universe: Stars from Birth to Death, 26th meeting of the IAU, Joint Discussion 4, 16-17 August 2006, Prague, Cze
Physics
Scientific paper
Introduction: As it is already known, the spectra of many Oe and Be stars present Discrete Absorption Components (DACs) which, due to their profiles' width as well as the values of the radial velocities, create a complicated profile of the main spectral lines (Bates & Halliwell, 1986). In this poster paper we detect the presence of this phenomenon (DACs or SACs) in the N V resonance lines of 20 Oe stars of different spectral subtypes. Method: In our study we apply the method proposed by Danezis et al. (2003, 2005) on the spectra of 20 Oe stars, taken with I.U.E. and we examine the variations of the physical parameters, stated below, as a function of the spectral subtype. Results: As a first result we detect that the C IV resonance lines consist of one to four Satellite Absorption Components (SACs or DACs, Danezis et al., 2005). With the above method we calculate the values of the apparent rotational and radial velocities, the Gaussian standard deviation of the random motions of the ions, the random velocities of these motions, as well as the optical depth, the column density, the Full Width at Half Maximum (FWHM), the absorbed and the emitted energy of the independent regions of matter which produce the main and the satellites components of the studied spectral lines. Discussion: We point out that the new and important aspect of our study is the values' calculation of the above parameters and their variations as a function of spectral subtype, using the DACs or SACs theory. Our results are a successful test of this theory and of Danezis et al. (2003, 2005) proposed method. This study is a part of a Ph. D. Thesis.
Antoniou Antonios
Danezis Emanouel
Dimitrijevic Milan S.
Lyratzi Evaggelia
Nikolaidis Dimitris
No associations
LandOfFree
Hyper Ionization Phenomena In The N V Region Of 20 Oe Stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Hyper Ionization Phenomena In The N V Region Of 20 Oe Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hyper Ionization Phenomena In The N V Region Of 20 Oe Stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1783374