An axisymmetric hydrodynamical model for the torus wind in AGN. III: Spectra from 3D radiation transfer calculations

TL;DR

This paper presents 3D radiation transfer simulations of AGN torus winds, producing synthetic X-ray spectra that enhance understanding of warm absorber features across various viewing angles.

Contribution

It introduces a comprehensive 3D radiation transfer approach to model AGN torus winds, improving the realism of synthetic spectra and their comparison with observations.

Findings

Rich warm absorber spectra are visible at wider inclinations than previously thought.

Results support the 'X-ray excited funnel flow' model for warm absorbers.

Synthetic spectra are consistent with observations of Seyfert 1 galaxies.

Abstract

We calculate a series of synthetic X-ray spectra from outflows originating from the obscuring torus in active galactic nuclei (AGN). Such modeling includes 2.5D hydrodynamical simulations of an X-ray excited torus wind, including the effects of X-ray heating, ionization, and radiation pressure. 3D radiation transfer calculations are performed in the 3D Sobolev approximation. Synthetic X-ray line spectra and individual profiles of several strong lines are shown at different inclination angles, observing times, and for different characteristics of the torus. Our calculations show that rich synthetic warm absorber spectra from 3D modeling are typically observed at a larger range of inclinations than was previously inferred from simple analysis of the transmitted spectra. In general, our results are supportive of warm absorber models based on the hypothesis of an "X-ray excited funnel flow" and are consistent with characteristics of such flows inferred from observations of warm absorbers from Seyfert 1 galaxies.