2003/02/06 by Arieh Königl, Arieh Konigl, Konigl, Arieh
Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics (astro-ph) #FOS: Physical sciences #Laser-Plasma Interactions and Diagnostics #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0302109
8 pages, invited review, to appear in Active Galactic Nuclei: From Central Engine to Host Galaxy (Meudon, July 2002), ASP Conference Series, Vol. 290
arxiv created 2003/02/06 · openalex publication_date 2003/02/06 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Analysis of spectral absorption features has led to the identification of several distinct outflow components in AGNs. The outflowing gas is evidently photoionized by the nuclear continuum source and originates in the accretion flow toward the central black hole. The most likely driving mechanisms are continuum and line radiation pressure and magnetic stresses. The theoretical modeling of these outflows involves such issues as: (1) Which of the above mechanisms actually contributes in each case? (2) How is the gas uplifted from the underlying accretion disk? (3) How can the intense central continuum radiation be shielded to allow efficient radiative driving? (4) Is the outflow continuous or clumpy, and, if clumpy, what is the nature and dynamical state of the ``clouds''? This review summarizes recent theoretical and observational results that bear on these questions and outlines prospects for further progress.