Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..39..487d&link_type=abstract
Astrophysics and Space Science, vol. 39, Feb. 1976, p. 487-494. Research supported by the Fundacao de Amparo a Pesquisa do Estad
Astronomy and Astrophysics
Astronomy
11
Black Holes (Astronomy), Stellar Models, Stellar Spectra, X Ray Stars, Bremsstrahlung, Turbulence Effects, X Ray Spectra
Scientific paper
The spectrum of Cyg X-1 has been calculated under the assumption that the radiation originates in a disk around a 11 solar-mass black-hole. Supersonic turbulence prevails in the outer parts of the disk and electron-electron bremsstrahlung appears to be responsible for the maintenance of the temperature at a level less than 10 to the 10th K near the inner edge of the disk. The theoretical spectrum gives the best fit with the observations when the Reynolds number is about 1200.
de Freitas Pacheco José Antonio
Steiner Joao Evangelista
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