Optical spectroscopy of Cyg X-1
Petr Hadrava (Astronomical Institute, Academy of Sciences, Prague)
TL;DR
This paper presents optical spectroscopic observations of Cyg X-1, focusing on orbital parameter determination and spectral line disentangling to analyze the system's components and circumstellar matter.
Contribution
It introduces a Fourier disentangling method applied to optical spectra of Cyg X-1 for orbital and spectral analysis.
Findings
Orbital parameters derived from HeI-line using Fourier disentangling.
Disentangled H_alpha-line into primary star profile and circumstellar emission.
Preliminary results on spectral line profiles and circumstellar matter.
Abstract
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).
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Taxonomy
TopicsAstrophysical Phenomena and Observations · Astronomical Observations and Instrumentation · Mechanics and Biomechanics Studies