Long-Term Variations of the Supergiant in the X-Ray Binary Cyg X-1

Details Long-Term Variations of the Supergiant in the X-Ray Binary Cyg X-1 Long-Term Variations of the Supergiant in the X-Ray Binary Cyg X-1

Jan 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ibvs.5678....1k&link_type=abstract

Information Bulletin on Variable Stars, 5678, 1.

Physics

5

Photometry, Spectroscopy, Model Atmosphere, Parameter Variations

Scientific paper

The photometrical and spectral variations point to the supergiant
parameters changes on the time scale of tens of years. Line profile
non-LTE simulations lead to the conclusion that the star radius has
grown about 1-4 from 1997 to 2003-2004 and the temperature decreased by
1300-2400 K

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