Preliminary analysis of an extreme helium sdO star: BD+25 4655

Abstract

Preliminary analysis of CCD spectra obtained by the 6m SAO telescope is presented. We have used simple H-He NLTE model atmospheres computed by TLUSTY to derive the basic parameters of the star.

12 pages, 5 figures, poster E44 at the IAU Symp.210, published on the CD-rom accompanying the proceedings