Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...382..416b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 382, Dec. 1, 1991, p. 416-432. Research supported by Alfred P. Sloan Founda
Astronomy and Astrophysics
Astrophysics
66
Absorption Spectra, Active Galactic Nuclei, Cosmic Rays, Quasars, Astronomical Models, Emission Spectra, Galactic Radiation, Radiation Pressure, Relativistic Particles
Scientific paper
It is shown how the escape of ultrarelativistic neutrons from the central engine of an AGN can lead to the production of a strong fast wind with most of the acceleration occurring outside the broad emission line region. This feature is required in order to explain observations of broad absorption line (BAL) QSOs, in which the blue wings of the broad emission lines are often absorbed. The dynamical and thermal structure of the wind is determined, and the formation of BALs in such an outflow is modeled, deriving line profiles and constraining the rate at which the energy or relativistic protons has be be converted to thermal energy in order to provide pressure confinement for the BAL clouds. The problem of acceleration and survival of the clouds is discussed.
Begelman Mitchell
de Kool Martijn
Sikora Marek
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