# Reflection geometries in absorbed and unabsorbed AGN

## TL;DR

This study analyzes NuSTAR X-ray spectra of 83 AGN to understand how reflection features vary with absorption, revealing different dominant reflectors and their relation to the AGN environment.

## Contribution

It provides a detailed spectral analysis of a large AGN sample, linking reflection features to absorption and geometry, and highlights the role of the surrounding cloud filling factor.

## Key findings

- Stronger reflection in mildly obscured sources.
- Reflection behavior varies with absorption, indicating different dominant reflectors.
- Fe line and Compton hump are roughly correlated.

## Abstract

The hard X-ray emission of active galactic nuclei (AGN), and in particular, the reflection component, is shaped by the innermost and outer regions of the galactic nucleus. Our main goal is to investigate the variation of the Compton hump amongst a population of sources and correlate it with other spectral properties to constrain the source geometry. We studied the NuSTAR hard X-ray spectra of a sample of 83 AGN and performed a detailed spectral analysis of each of them. Based on their spectral shape, we divided the sample into five categories and also studied their stacked spectra. We found a stronger reflection in mildly obscured sources, which verifies the results reported in previous works. In addition, the reflection behaviour, and probably origin, varies with absorption. The accretion disc seems to be the main reflector in unabsorbed sources. A clumpy torus seems to produce most of the reflection in obscured sources. The filling factor of the clouds surrounding the active nucleus is a key parameter that drives the appearance of AGN. Finally, we found that the Fe line and the Compton hump are roughly correlated, as expected.