![]() ![]() On the other hand, a positive feedback scenario, supported by narrow emission in Hα extending along the edges of the outflow cone, suggests that galaxy-wide outflows could also have a twofold role in the evolution of the host galaxy. Nonetheless as narrow, spatially-extended Hα emission, indicating star formation rates of at least 50–100 M ⊙ yr −1, has been detected, either AGN feedback is not affecting the whole host galaxy, or star formation is completely quenched only by several feedback episodes. ![]() On paper fast outflows are spatially anti-correlated with star-formation powered emission, i.e., star formation is suppressed in the area affected by the outflow. Also, the high signal-to-noise SINFONI observations allow the identification of faint narrow Hα emission (FWHM < 500 km/s), which is spatially extended and associated with star formation in the host galaxy. All the quasars show λ5007 line detection of fast, extended outflows. Hereby I will analyse integral-field spectroscopic data for six quasars at z ~ 2.4 obtained with SINFONI in the H- and K-band. Such outflows could potentially quench the start formation within the host galaxy, but a clear evidence of negative feedback in action is still missing. In the whole range of redshifts and luminosities studied so far, galaxies hosting an AGN frequently show fast and extended outflows consisting in both ionized and molecular gas. Galaxy evolution is likely to be shaped by negative feedback from active galactic nuclei (AGN). 2Kavli Institute for Cosmology, University of Cambridge, Cambridge, United Kingdom.1Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom. ![]()
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