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| Paper: |
AGN Winds and the Black-Hole - Galaxy Connection |
| Volume: |
460, AGN Winds in Charleston |
| Page: |
235 |
| Authors: |
Zubovas, K.; King, A. R. |
| Abstract: |
During the last decade, wide–angle powerful outflows from AGN, both on parsec
and kpc scales, have been detected in many galaxies. These outflows are widely
suspected to be responsible for sweeping galaxies clear of their gas. We
present the analytical model describing the propagation of such outflows and
calculate their observable properties. Large–scale AGN–driven outflows
should have kinetic luminosities ∼ηLEdd/2 ∼ 0.05LEdd and momentum rates ∼ 20LEdd/c, where LEdd is the
Eddington luminosity of the central black hole and η∼ 0.1 its
radiative accretion efficiency. This creates an expanding two–phase medium in
which molecular species coexist with hot gas, which can persist after the
central AGN has switched off. This picture predicts outflow velocities ∼
1000–1500 km s-1 and mass outflow rates up to 4000 M☉ yr–1 on kpc scales, fixed mainly by the host galaxy velocity dispersion
(or equivalently black hole mass). We compare our prediction with recent
observational data, finding excellent agreement, and suggest future
observational tests of this picture. |
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