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- W4379985889 abstract "ABSTRACT Galaxy-wide outflows driven by active galactic nuclei (AGN) are an important ingredient in galaxy evolution. Analytical calculations suggest that such outflows have significant inertia and can persist long after the AGN itself fades away. We use hydrodynamical simulations of outflows in idealized galaxy bulges to investigate the propagation of these ‘fossil’ AGN outflows. We find that fossil outflows should be common in gas-poor galaxies but form only rarely in gas-rich ones; in general, fossil outflows should outnumber driven ones by a factor of a few in the local Universe, and possibly more at high redshift. When they do form, fossil outflows tend to be lopsided and detached from the nucleus, and colder than their driven counterparts, with a more prominent molecular phase. Spatially resolved and/or multiphase observations can help distinguish fossil AGN outflows from star formation-driven ones, which have similar integrated properties. We discuss a number of spatially-resolved observations of outflows, suggesting that most show evidence of fossil outflow existence, sometimes together with driven outflows on smaller scales." @default.
- W4379985889 created "2023-06-10" @default.
- W4379985889 creator A5067677783 @default.
- W4379985889 creator A5092123236 @default.
- W4379985889 date "2023-06-05" @default.
- W4379985889 modified "2023-09-25" @default.
- W4379985889 title "Life after AGN switch off: evolution and properties of fossil galactic outflows" @default.
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