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

## TL;DR

This study uses near-infrared spectroscopy to analyze ionized and warm molecular outflows in a type-2 quasar, revealing their properties, sizes, and potential impact on the host galaxy's evolution.

## Contribution

First detailed near-infrared analysis of multi-phase outflows in a luminous type-2 quasar, measuring their sizes, rates, and efficiencies.

## Key findings

- Ionized outflow is faster than molecular outflow.
- Outflow sizes are approximately 1.4 kpc for both phases.
- Molecular outflow has a kinetic coupling efficiency of about 1.7% of L_bol.

## 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$0.20 kpc respectively). We use these radii, the broad emission-line luminosities and in the case of the ionized outflow, the density calculated from the trans-auroral [OII] and [SII] lines, to derive mass outflow rates and kinetic coupling efficiencies. Whilst the ionized and warm molecular outflows represent a small fraction of the AGN power ($\leq$0.033% and 0.0001% of L$_{bol}$ respectively), the total molecular outflow, whose mass is estimated from an assumed warm-to-cold gas mass ratio of 6$\times10^{-5}$, 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.