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Date and Time of the Query: 2019-06-25 T03:57:58 PDT
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For refcode 2017ApJ...851..126V:
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2017ApJ...851..126V Galactic-scale Feedback Observed in the 3C 298 Quasar Host Galaxy Vayner, Andrey; Wright, Shelley A.; Murray, Norman; Armus, Lee; Larkin, James E.; Mieda, Etsuko Abstract. We present high angular resolution multiwavelength data of the 3C 298 radio-loud quasar host galaxy (z = 1.439) taken using the W.M. Keck Observatory OSIRIS integral field spectrograph (IFS) with adaptive optics, the Atacama Large Millimeter/submillimeter Array (ALMA), the Hubble Space Telescope (HST) WFC3, and the Very Large Array (VLA). Extended emission is detected in the rest-frame optical nebular emission lines Hbeta, [O III], Halpha, [N II], and [S II], as well as in the molecular lines CO (J = 3-2) and (J = 5-4). Along the path of the relativistic jets of 3C 298, we detect conical outflows in ionized gas emission with velocities of up to 1700 {km} {{{s}}}^-1^ and an outflow rate of 450--1500 {M}_o_ {{yr}}^-1^ extended over 12 kpc. Near the spatial center of the conical outflow, CO (J = 3-2) emission shows a molecular gas disk with a rotational velocity of +/-150 {km} {{{s}}}^-1^ and total molecular mass ({M}_{{{H_}}_2_}) of 6.6+/- 0.36x {10}^9^ {M}_o_. On the blueshifted side of the molecular disk, we observe broad extended emission that is due to a molecular outflow with a rate of 2300 {M}_o_ {{yr}}^-1^ and depletion timescale of 3 Myr. We detect no narrow Halpha emission in the outflow regions, suggesting a limit on star formation of 0.3 {M}_o_ {{yr}}^-1^ {{kpc}}^-2^. Quasar-driven winds are evacuating the molecular gas reservoir, thereby directly impacting star formation in the host galaxy. The observed mass of the supermassive black hole is {10}^9.37{--^9.56} {M}_o_, and we determine a dynamical bulge mass of {M}_{bulge_}=1{--}1.7x {10}^10^\tfrac{R}{1.6 {kpc}} {M}_o_. The bulge mass of 3C 298 lies 2--2.5 orders of magnitude below the expected value from the local galactic bulge---supermassive black hole mass ({M}_{bulge_}{--}{M}_{BH_}) relationship. A second galactic disk observed in nebular emission is offset from the quasar by 9 kpc, suggesting that the system is an intermediate-stage merger. These results show that galactic-scale negative feedback is occurring early in the merger phase of 3C 298, well before the coalescence of the galactic nuclei and assembly on the local {M}_{bulge_}{--}{M}_{BH_} relationship. Key words: galaxies: active, galaxies: high-redshift, galaxies: kinematics and dynamics, quasars: emission lines, quasars: individual: 3C 298, quasars: supermassive black holes
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