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The additional radiation of Cyg X‐1 at primary minimum
Author(s) -
Voloshina I.,
Lyuty V. M.
Publication year - 1995
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2103160203
Subject(s) - physics , light curve , astrophysics , photoelectric effect , radiation , amplitude , electron , primary (astronomy) , binary number , phase (matter) , optics , nuclear physics , arithmetic , mathematics , quantum mechanics
New UBV ‐photoelectric observations of the well‐known massive X‐ray binary system Cyg X‐1/V 1357 Cyg are obtained near the primary minimum. The detailed analysis of these observations confirms the existence of additional blue radiation which appears as a narrow peak with an amplitude of 0.01–0.02 mag near phase 0.00 on the light curve (the superior conjunction of the relativistic component), firstly detected by Lyuty (1985). This emission does not appear at every orbital cycle. The appearance of this narrow peak of additional blue radiation on the light curve of Cyg X‐1 can be explained as the radiation of relativistic electrons in the disturbed magnetic field of the optical star in frames of the model proposed by Ikhsanov and Fabrika (1990).