A near-infrared study of the multi-phase outflow in the type-2 quasar J1509+0434

Abstract

Based on new near-infrared spectroscopic data from the instrument EMIR on the 10.4 m Gran Telescopio Canarias (GTC) we report the presence of an ionized and warm molecular outflow in the luminous type-2 quasar J150904.22+043441.8 (z = 0.1118). The ionized outflow is faster than its molecular counterpart, although the outflow sizes that we derive for them are consistent within the errors (1.34$\pm$0.18 kpc and 1.46$\pm$0.20 kpc respectively). We use these radii, the broad emission-line luminosities and in the case of the ionized outflow, the density calculated from the trans-auroral [OII] and [SII] lines, to derive mass outflow rates and kinetic coupling efficiencies. Whilst the ionized and warm molecular outflows represent a small fraction of the AGN power ($\le$0.033% and 0.0001% of L${}_{bol}$ respectively), the total molecular outflow, whose mass is estimated from an assumed warm-to-cold gas mass ratio of 6$\times 10^{-5}$, has a kinetic coupling efficiency of $\sim$1.7%L${}_{bol}$. Despite the large uncertainty, this molecular outflow represents a significant fraction of L${}_{bol}$ and it could potentially have a significant impact on the host galaxy. In addition, the quasar spectrum reveals bright and patchy narrow Pa$\alpha$ emission extending out to 4 arcsec (8 kpc) South-East and North-West from the active nucleus.

6 pages, 4 figures, accepted for publication in MNRAS Letters

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• Spatially resolved evidence of the impact of quasar driven outflows on recent star formation : The case of Mrk 34
• Warm molecular and ionized gas kinematics in the Type-2 quasar J0945+1737
• The impact of ionised outflows from z$\sim$2.5 quasars is not through instantaneous in-situ quenching: the evidence from ALMA and VLT/SINFONI
• A Comparison of Outflow Properties in AGN Dwarfs vs. Star Forming Dwarfs
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• An Escaping Outflow in a Galaxy with an Intermediate-mass Black Hole