%0 Generic %1 liu2013observations %A Liu, Guilin %A Zakamska, Nadia L. %A Greene, Jenny E. %A Nesvadba, Nicole P. H. %A Liu, Xin %D 2013 %K energy feedback quasar %T Observations of Feedback from Radio-Quiet Quasars: II. Kinematics of Ionized Gas Nebulae %U http://arxiv.org/abs/1305.6922 %X The prevalence and energetics of quasar feedback is a major unresolved problem in galaxy formation theory. In this paper, we present Gemini Integral Field Unit observations of ionized gas around eleven luminous, obscured, radio-quiet quasars at z~0.5 out to ~15 kpc from the quasar; specifically, we measure the kinematics and morphology of O III5007 emission. The round morphologies of the nebulae and the large line-of-sight velocity widths (with velocities containing 80% of the emission as high as 1000 km/s combined with relatively small velocity difference across them (from 90 to 520 km/s) point toward wide-angle quasi-spherical outflows. We use the observed velocity widths to estimate a median outflow velocity of 760 km/s, similar to or above the escape velocities from the host galaxies. The line-of-sight velocity dispersion declines slightly toward outer parts of the nebulae (by 3% per kpc on average). The majority of nebulae show blueshifted excesses in their line profiles across most of their extents, signifying gas outflows. For the median outflow velocity, we find a kinetic energy flow between 4x10^44 and 3x10^45 erg/s and mass outflow rate between 2000 and 20000 Msun/yr. These values are large enough for the observed quasar winds to have a significant impact on their host galaxies. The median rate of converting bolometric luminosity to kinetic energy of ionized gas clouds is ~2%. We report four new candidates for "super-bubbles" -- outflows that may have broken out of the denser regions of the host galaxy.

@misc{liu2013observations, abstract = {The prevalence and energetics of quasar feedback is a major unresolved problem in galaxy formation theory. In this paper, we present Gemini Integral Field Unit observations of ionized gas around eleven luminous, obscured, radio-quiet quasars at z~0.5 out to ~15 kpc from the quasar; specifically, we measure the kinematics and morphology of [O III]5007 emission. The round morphologies of the nebulae and the large line-of-sight velocity widths (with velocities containing 80% of the emission as high as 1000 km/s combined with relatively small velocity difference across them (from 90 to 520 km/s) point toward wide-angle quasi-spherical outflows. We use the observed velocity widths to estimate a median outflow velocity of 760 km/s, similar to or above the escape velocities from the host galaxies. The line-of-sight velocity dispersion declines slightly toward outer parts of the nebulae (by 3% per kpc on average). The majority of nebulae show blueshifted excesses in their line profiles across most of their extents, signifying gas outflows. For the median outflow velocity, we find a kinetic energy flow between 4x10^{44} and 3x10^{45} erg/s and mass outflow rate between 2000 and 20000 Msun/yr. These values are large enough for the observed quasar winds to have a significant impact on their host galaxies. The median rate of converting bolometric luminosity to kinetic energy of ionized gas clouds is ~2%. We report four new candidates for "super-bubbles" -- outflows that may have broken out of the denser regions of the host galaxy.}, added-at = {2013-05-31T17:13:20.000+0200}, author = {Liu, Guilin and Zakamska, Nadia L. and Greene, Jenny E. and Nesvadba, Nicole P. H. and Liu, Xin}, biburl = {https://www.bibsonomy.org/bibtex/2631085bce09a067babc5cc2ec842d8ed/miki}, description = {[1305.6922] Observations of Feedback from Radio-Quiet Quasars: II. Kinematics of Ionized Gas Nebulae}, interhash = {d3093a27ae4318861a9a1e5dddc5bd35}, intrahash = {631085bce09a067babc5cc2ec842d8ed}, keywords = {energy feedback quasar}, note = {cite arxiv:1305.6922Comment: 22 pages, 11 figures, 2 tables, submitted to MNRAS}, timestamp = {2013-05-31T17:13:20.000+0200}, title = {Observations of Feedback from Radio-Quiet Quasars: II. Kinematics of Ionized Gas Nebulae}, url = {http://arxiv.org/abs/1305.6922}, year = 2013 }