Active Nuclei As Drivers And Quenchers Of Star Formation

The environments of powerful AGN are busy places. In addition to a powerful radiation field and gas clouds in rapid motion, there must often be outflows spanning large solid angles, to account for the extended emission-line regions and absorptionline structures seen in some active nuclei. This opens the possibility that AGN can trigger star formation in the surrounding galaxies, by compression of gas clouds on impact of the outflowing gas or at the interface with the rapidly emerging jets. One

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