Abstract
We have calculated the spectrum of Cyg X-1 under the assumption that the radiation orginates in a disk around a 11M ⊙ black-hole. Supersonic turbulence prevails in the outer parts of the disk and electron-electron bremsstrahlung appears to be resonsible for the maintenance of the temperature at a level less than 1010 K near the inner edge of the disk. The theoretical spectrum gives the best fit with the observations if the Reynolds number is about 1200.
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De Freitas Pacheco, J.A., Steiner, J.E. The spectrum of Cyg X-1 — A theoretical model. Astrophys Space Sci 39, 487–494 (1976). https://doi.org/10.1007/BF00648346
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DOI: https://doi.org/10.1007/BF00648346