Nardini, E and Reeves, JN and Gofford, J and Harrison, FA and Risaliti, G and Braito, V and Costa, MT and Matzeu, GA and Walton, DJ and Behar, E and Boggs, SE and Christensen, FE and Craig, WW and Hailey, CJ and Matt, G and Miller, JM and O'Brien, PT and Stern, D and Turner, TJ and Ward, MJ (2015) Galaxy evolution: black hole feedback in the luminous quasar PDS 456. Science, 347 (6224). 860 -863. ISSN 1095-9203
1502.06636v1.pdf - Accepted Version
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The evolution of galaxies is connected to the growth of supermassive black holes in their centers. During the quasar phase, a huge luminosity is released as matter falls onto the black hole, and radiation-driven winds can transfer most of this energy back to the host galaxy. Over five different epochs, we detected the signatures of a nearly spherical stream of highly ionized gas in the broadband x-ray spectra of the luminous quasar PDS 456. This persistent wind is expelled at relativistic speeds from the inner accretion disk, and its wide aperture suggests an effective coupling with the ambient gas. The outflow's kinetic power larger than 10(46) ergs per second is enough to provide the feedback required by models of black hole and host galaxy coevolution.
|Uncontrolled Keywords:||quasars, black holes|
|Subjects:||Q Science > QB Astronomy|
|Date Deposited:||10 Mar 2015 09:26|
|Last Modified:||15 Sep 2015 10:50|
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