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A NewModel for the Structure of the DACs and SACs Regions in the Oe and Be Stellar Atmospheres

Antoniou, A.; Danezis, E.; Lyratzi, E. +4 more

In this paper we present a new mathematical model for the density regions where a specific spectral line and its SACs/DACs are created in the Oe and Be stellar atmospheres. In the calculations of final spectral line function we consider that the main reasons of the line broadening are the rotation of the density regions creating the spectral line …

The Complex Structure of the Mg II λλ 2795.523, 2802.698 Å Regions of 64 Be Stars

Lyratzi, Evaggelia; Danezis, Emmanouel; Popovic, Luka C. +3 more

Here we consider the presence of absorption components shifted to the violet or red side of the main spectral line (satellite or discrete absorption components, i.e., SACs or DACs) in the regions of the Mg II resonance lines in Be stars as well as their kinematical characteristics. Namely, our objective is to check whether there exists a common ph…