%0 Generic %1 Cano-Diaz2011 %A Cano-Diaz, M. %A Maiolino, R. %A Marconi, A. %A Netzer, H. %A Shemmer, O. %A Cresci, G. %D 2011 %K feedback quasar quenching sfr %T Observational evidence of quasar feedback quenching star formation at high redshift %U http://arxiv.org/abs/1112.3071 %X Most galaxy evolutionary models require quasar feedback to regulate star formation in their host galaxies. In particular, at high redshift, models expect that feedback associated with quasar-driven outflows is so efficient that the gas in the host galaxy is largely swept away or heated up, hence suppressing star formation in massive galaxies. We observationally investigate this phenomenon by using VLT-SINFONI integral field spectroscopy of the luminous quasar 2QZJ002830.4-281706 at z=2.4. The spectra sample the optical emission lines redshifted into the near-IR. The OIII5007 emission line kinematics map reveals a massive outflow on scales of several kpc. The detection of narrow Halpha emission reveals star formation in the quasar host galaxy, with SFR 100 Msun/yr. However, the star formation is not distributed uniformly, it is strongly suppressed in the region with the highest outflow velocity and highest velocity dispersion. This result indicates that in this region star formation is strongly quenched by the quasar outflow, which is cleaning the galaxy disk of its molecular gas. This is one of the first direct observational evidence of quasar feedback quenching star formation at high redshift.

@misc{Cano-Diaz2011, abstract = { Most galaxy evolutionary models require quasar feedback to regulate star formation in their host galaxies. In particular, at high redshift, models expect that feedback associated with quasar-driven outflows is so efficient that the gas in the host galaxy is largely swept away or heated up, hence suppressing star formation in massive galaxies. We observationally investigate this phenomenon by using VLT-SINFONI integral field spectroscopy of the luminous quasar 2QZJ002830.4-281706 at z=2.4. The spectra sample the optical emission lines redshifted into the near-IR. The [OIII]5007 emission line kinematics map reveals a massive outflow on scales of several kpc. The detection of narrow Halpha emission reveals star formation in the quasar host galaxy, with SFR \sim 100 Msun/yr. However, the star formation is not distributed uniformly, it is strongly suppressed in the region with the highest outflow velocity and highest velocity dispersion. This result indicates that in this region star formation is strongly quenched by the quasar outflow, which is cleaning the galaxy disk of its molecular gas. This is one of the first direct observational evidence of quasar feedback quenching star formation at high redshift. }, added-at = {2011-12-15T08:18:20.000+0100}, author = {Cano-Diaz, M. and Maiolino, R. and Marconi, A. and Netzer, H. and Shemmer, O. and Cresci, G.}, biburl = {https://www.bibsonomy.org/bibtex/2ed6517380a391c0efc9f837aaee20dbb/miki}, description = {[1112.3071] Observational evidence of quasar feedback quenching star formation at high redshift}, interhash = {cd5d2d7c5b3d7515b3ba13b688368b14}, intrahash = {ed6517380a391c0efc9f837aaee20dbb}, keywords = {feedback quasar quenching sfr}, note = {cite arxiv:1112.3071Comment: resubmitted to A&A Letters after addressing referee's comments}, timestamp = {2011-12-15T08:18:20.000+0100}, title = {Observational evidence of quasar feedback quenching star formation at high redshift}, url = {http://arxiv.org/abs/1112.3071}, year = 2011 }