A systematic study of photoionized emission and warm absorption signatures of the NLS1 Mrk 335

TL;DR

This study analyzes high-resolution X-ray spectra of Mrk 335, revealing complex emission and absorption features, and investigates their relationship with flux variability, finding limited correlation and suggesting a distant origin for some components.

Contribution

It provides a comprehensive analysis of archival spectra of Mrk 335, modeling emission lines and examining their flux dependence, which advances understanding of the AGN's circumnuclear environment.

Findings

X-ray line fluxes are less variable than the continuum.

Warm absorber properties do not correlate with flux changes.

Emission and reflection components did not respond to flux drops.

Abstract

We present an analysis of all the archival high resolution spectra of the Narrow-line Seyfert 1 galaxy Mrk~335 obtained with Reflection Grating Spectrometer (RGS) on board \textit{XMM-Newton}. The spectra show rich emission and absorption features in low and intermediate flux intervals. We model the emission lines with the \textsc{pion\_xs} grid and try to find any possible correlation between the properties of the emitting gas and the source flux. Current data does not allow detailed trace of the response of the line emitting gas to the X-ray flux of Mrk~335, but the flux of the X-ray lines is significantly less variable than the X-ray continuum. We also find that the warm absorber's properties are not correlated with the flux variability. From the latest \textit{XMM-Newton} observation in 2019 December, we find that the photoionized emission and distant reflection components have not responded to the flux drop of Mrk~335 from 2018 July. However, the possible existence of partial covering absorber in the 2018--2019 low state of Mrk~335 makes it difficult to constrain the scale of the emitting gas using this lack of response.