Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1201..170t&link_type=abstract
THE MONSTER'S FIERY BREATH: FEEDBACK IN GALAXIES, GROUPS, AND CLUSTERS. AIP Conference Proceedings, Volume 1201, pp. 170-176 (2
Astronomy and Astrophysics
Astronomy
Intergalactic Matter, Star Formation, Quasars, Galactic Nuclei, Uv Astronomy, Intergalactic Matter, Quasar Absorption And Emission-Line Systems, Lyman Forest, Star Formation, Quasars, Galactic Nuclei, Circumnuclear Matter, And Bulges, Ultraviolet
Scientific paper
In many modern theoretical models quasar feedback is invoked to drive gas and dust from galaxies and abruptly quench star formation. To test this idea, we obtained deep UV-optical spectroscopy of 35 massive post-starburst galaxies at z~0.6. These objects are the likely remnants of major mergers, observed a few hundred million years after the peak of their star formation and black hole activity. In 2/3 of the sample we detect Mg II absorption lines that are blueshifted by 500-2400 km s-1 with respect to the host galaxy. These fossil galactic winds are significantly faster than winds observed in starburst galaxies. We estimate the mass and energy of the outflows and conclude that quasar feedback played a role in expelling the cool gas and quenching star formation.
Diamond-Stanic Aleksandar M.
Moustakas John
Tremonti Christy
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