On the two states of CYG X-1 and related sources

Details On the two states of CYG X-1 and related sources On the two states of CYG X-1 and related sources

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986stin...8713367k&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Accretion Disks, Astronomical Models, Black Holes (Astronomy), Galactic Nuclei, X Ray Binaries, Active Galactic Nuclei, Electron-Positron Pairs, Emission Spectra, Energy Spectra, Gravitational Effects, Kinetic Energy, Plasmas (Physics)

Scientific paper

A model for active galactic nuclei (AGN), employing quasi-spherical accretion onto a black hole, when scaled down to solar mass objects, provides a straightforward account of the bimodal spectral behavior of Cyg X-1 and the other galactic black hole candidates. It is argued that the change in the spectrum is due to the drastic increase of the source compactness (L/R) with the accretion rate m and the subsequent conversion of most of the energy released by accretion into e(+)e(-) pairs. It is also argued that similar changes may be observed in active galactic nuclei.

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