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Paper: Peculiarities of the Chemical Composition of the Optical Component of Cyg X-1
Volume: 378, Why Galaxies Care About AGB Stars: Their Importance as Actors and Probes
Page: 123
Authors: Karitskaya, E.A.; Shimanskii, V.V.; Sakhibullin, N.A.; Bochkarev, N.G.
Abstract: By using high-resolution spectra and a specially modified model-atmosphere code, we have obtained the main characteristics and chemical composition of the optical component of Cyg X1. We find a metallicity ([M/H] = 0.34 dex) typical of young stars. The composition has been affected by matter transformation by the reactions of the CNO cycle at the main sequence stage ([N/C] = [N/O] = 0.7 dex) and by light-element burning ([Ne/H] = [Si/H] = 0.7 dex).
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