http://arxiv.org/abs/1706.05527
We have performed a high sensitivity observation of the UFO/BAL quasar APM 08279+5255 at z=3.912 with NOEMA at 3.2 mm, aimed at detecting fast moving molecular gas. We report the detection of blueshifted CO(4-3) with maximum velocity (v95\%) of $-1340$ km/s, with respect to the systemic peak emission, and a luminosity of $L’ = 9.9\times 10^9 ~\mu^{-1}$ K km/s pc$^{-2}$ (where $\mu$ is the lensing magnification factor). This is the first detection of fast molecular gas at redshift $>3$. We derive a mass flow rate of molecular gas $\rm \dot M=1.6\times 10^3$ M$\odot$/yr, and momentum boost $\dot P{OF} / \dot P_{AGN} = 2-8$, therefore consistent with a momentum driven flow. For the largest $\dot P_{OF}$ the scaling is also consistent with a energy conserving flow with an efficiency of $\sim$10-20\%. The present data can hardly discriminate between the two scenarios. The mass loading factor of the molecular outflow $\eta=\dot M_{OF}/SFR$ is $>>1$. We also detect a molecular emission line at a frequency of 94.85 GHz, corresponding to a rest frame frequency of 465.903 GHz, which we identified with the cation molecule $\rm N_2H^+$(5-4), which would constitute the first detection of this species at high redshift.
C. Feruglio, A. Ferrara, M. Bischetti, et. al.
Tue, 20 Jun 17
46/72
Comments: Submitted to Astronomy & Astrophysics
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