Search Publications
Variability of optical and X-ray spectra of Gamma Cassiopeia stars
Yakunin, I. A.; Kholtygin, A. F.; Ryspaeva, E. B. +1 more
Stars of the γ Cas type (γ Cas analogs) belong to a small group of Be stars with a high X-ray luminosity of 10 31 ‑ 10 33 erg/s and an anomalously high temperature of the plasma emitting in the X-ray range of 10–20 keV or more, assuming a completely thermal X-ray emission. The results of the analysis of the optical spectra of γ Cas under the progr…
Variable stars in the field of open cluster NGC 6819
Karimov, R. G.; Gaysin, R. A.
Here we present preliminary results of searching and study of variable stars based on space observation data of the TESS mission in the field of the open star cluster NGC 6819. The light curves of variable stars of various types located in the field of an open cluster are studied. Based on the data from the GAIA DR3 mission, the probable members o…