Other
Scientific paper
Nov 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...262..497w&link_type=abstract
Astrophysical Journal, Part 1, vol. 262, Nov. 15, 1982, p. 497-510.
Other
66
Astronomical Models, Emission Spectra, Quasars, Relativistic Particles, Thermal Plasmas, Bremsstrahlung, Flux (Rate), Line Spectra, Luminosity, Numerical Integration, Particle Trajectories, Stellar Winds
Scientific paper
Evidence supporting the view that the clouds giving rise to the broad emission lines (BELs) of QSOs are confined by the pressure of an expanding thermal gas, and that a flux of relativistic particles whose luminosity is comparable to that of the photon luminosity streams through this gas, is considered. The resulting heating and momentum deposition produces a transonic thermal wind whose dynamic properties are calculated in detail. This wind accelerates and confines the emission line clouds, thereby producing the BEL profiles. A QSO emission line region characteristic size of about 1 pc is obtained, and is shown to depend on luminosity in such a way that the ionization parameter is approximately constant over a wide luminosity range. An X-ray luminosity due to thermal bremsstrahlung of 1-10% of the optical luminosity is another consequence of the model.
Christiansen Wayne A.
Schiano V. R. A.
Scott Joshua S.
Weymann Ray J.
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