Detection of infrared variability in Cygnus X - 1

Details Detection of infrared variability in Cygnus X - 1 Detection of infrared variability in Cygnus X - 1

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.256p..39l&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 256, no. 2, May 15, 1992, p. 39P-42P. Research supporte

Astronomy and Astrophysics

Astronomy

8

Accretion Disks, Black Holes (Astronomy), Infrared Stars, Near Infrared Radiation, Variable Stars, X Ray Binaries, Extremely High Frequencies, Infrared Astronomy, Radio Astronomy

Scientific paper

Near-infrared measurements of Cygnus X - 1 in the J and K bands, carried out with the 1.5-m telescope at the Rothney Astrophysical Observatory, show significant variability with an amplitude of 0.3 mag in the J and K bands. The observations indicate the presence of two maxima at 5.6-d orbital phases 0.25 and 0.70. The variability in the infrared emission is suggested to be produced by the accretion disk which is responsible for the X-ray emission from the Cygnus X - 1 system.

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