Detection of high velocity outflows in Seyfert 1 galaxy Mrk 590

TL;DR

This paper reports the detection of ultra-fast outflows in the Seyfert 1 galaxy Mrk 590 using Chandra X-ray spectra, revealing multiple high-velocity components with varying ionization states that impact AGN feedback models.

Contribution

First detection of ultra-fast outflows in Mrk 590 with detailed velocity and ionization analysis, expanding understanding of AGN outflow parameter space.

Findings

Detected outflows at 0.176c, 0.0738c, and tentative 0.0867c velocities.

Outflows exhibit diverse ionization parameters and column densities.

Outflows have significant implications for AGN feedback mechanisms.

Abstract

We report on the detection of ultra-fast outflows in the Seyfert~1 galaxy Mrk 590. These outflows are identified through highly blue-shifted absorption lines of OVIII and NeIX in the medium energy grating spectrum and SiXIC and MgXII in the high energy grating spectrum on board Chandra X-ray observatory. Our best fit photoionization model requires two absorber components at outflow velocities of 0.176c and 0.0738c and a third tentative component at 0.0867c. The components at 0.0738c and 0.0867c have high ionization parameter and high column density, similar to other ultra-fast outflows detected at low resolution by Tombesi et al. These outflows carry sufficient mass and energy to provide effective feedback proposed by theoretical models. The component at 0.176c, on the other hand, has low ionization parameter and low column density, similar to those detected by Gupta et al. in Ark~564. These absorbers occupy a different locus on the velocity vs. ionization parameter plane and have opened up a new parameter space of AGN outflows. The presence of ultra-fast outflows in moderate luminosity AGNs poses a challenge to models of AGN outflows.