'Cold' material in non-thermal sources

Details 'Cold' material in non-thermal sources 'Cold' material in non-thermal sources

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.233..475g&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 233, July 15, 1988, p. 475-484.

Astronomy and Astrophysics

Astronomy

326

Accretion Disks, Active Galactic Nuclei, Gas Dynamics, Nonthermal Radiation, Quasars, Compton Effect, Extreme Ultraviolet Radiation, Thomson Scattering, X Ray Spectra

Scientific paper

The expected form of the continuum spectrum from accretion-driven compact sources of nonthermal radiation, such as active galactic nuclei and quasars, is examined. The need for models of the radiation spectrum of these sources to include the significant amount of gas in their central continuum emitting regions is stressed. It is suggested that nonthermal radiation which occurs in the hot phase would be reprocessed by 'cool phase' clouds or filaments which would absorb energy by Compton heating and free-free absorption and reradiate it as a soft thermal component. It is concluded that the presence of a UV bump does not require any primary power production that is essentially thermal.

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