A high velocity component to the complex absorption in IRAS 13349+2438

TL;DR

This paper analyzes XMM-Newton spectra of IRAS 13349+2438, revealing multiple warm absorption zones and a newly discovered ultra-fast outflow with velocities around 0.13c, significantly impacting the quasar's energy output.

Contribution

It reports the discovery of an ultra-fast outflow in IRAS 13349+2438, providing new insights into quasar absorption features and outflow dynamics.

Findings

Detection of an ultra-fast outflow at ~0.13c velocity.

Warm absorbers have similar mass outflow rates.

High-velocity gas dominates the kinetic power.

Abstract

We present an analysis of XMM-Newton spectra of the low-redshift quasar IRAS 13349+2438. The RGS spectrum shows a large number of absorption lines from two zones of warm absorption, with velocities of $\sim$-600 km s$^{-1}$, as noted by previous authors. Additionally, we find robust evidence from multiple Ly{\alpha} absorption lines for a previously undiscovered ultra-fast zone of absorption, with an outflow velocity of $-0.13\pm0.01c$. The warm absorbers and ultra-fast outflow have similar mass outflow rates, around 40% of the Eddington accretion rate, but the kinetic power is dominated by the high velocity gas, which has a power of $\sim$4% of the Eddington luminosity.