Advances in Astronomy and Space Physics, Volume 1 (2011)
The first spectra for the RX J0440.9+4431 from 2m Terskol telescope
1Taras Shevchenko National University of Kyiv, Glushkova ave., 4, 03127, Kyiv, Ukraine
2International Center for Astronomical, Medical and Ecological Research Terskol Observatory
2International Center for Astronomical, Medical and Ecological Research Terskol Observatory
Abstract
We present the first results on the spectra of Be/X-ray binary RX J0440.9+4431 obtained with the 2m Ritchey-Chretein-Coude telescope with Cassegrain Multi Mode Spectrograph (CMMS) (with R = 14000) at Terskol observatory. The Hα line profile indicates that the new episode of the V/R variability is occuring in the system. The profiles of the Hα, Hβ and He I 7065.71, 6678.15, 5875.97 lines were analyzed and equivalent width were determined. We compared our Hα line profile parameters with the previous results from Reig et al. (2005) and estimated characteristic time scale for disc changes as about 14 years.