The star HDE 226868 known as an optical counterpart of the black hole candidate Cyg X-1 has been observed in H_alpha region using spectrograph at Ondrejov 2-m telescope. The orbital parameters are determined from HeI-line by means of the author's method of Fourier disentangling. Preliminary results are also presented of disentangling the H_alpha-line into a P-Cyg profile of the (optical) primary and an emission profile of the circumstellar matter (and a telluric component).
Cite
@article{arxiv.0710.0758,
title = {Optical spectroscopy of Cyg X-1},
author = {Petr Hadrava},
journal= {arXiv preprint arXiv:0710.0758},
year = {2007}
}
Comments
Proceedings of RAGtime 9: Workshops on black holes and neutron stars, S. Hledik & Z. Stuchlik eds., Silesian University in Opava, Czech Republic, 8 pages, 5 figures