Spectroscopy and spectropolarimetry of AGN: from observations to modelling

TL;DR

This paper reviews how spectroscopy and spectropolarimetry are essential tools for studying the complex inner structures of active galactic nuclei, from observations to modeling.

Contribution

It provides a comprehensive overview of observational techniques and modeling approaches for understanding AGN components and their roles in galaxy evolution.

Findings

Spectroscopy reveals detailed properties of AGN inner regions.

Spectropolarimetry helps uncover obscured structures within AGN.

Modeling connects observational data to physical characteristics of AGN components.

Abstract

Active galactic nuclei (AGN) are one of the most luminous objects in the Universe, emitting powerful continuum and line emission across all wavelength bands. They represent an important link in the investigations of the galaxy evolution and cosmology. The resolving of the AGN inner structure is still a difficult task with current instruments, therefore the spectroscopy and spectropolarimetry are crucial tools to investigate these objects and their components, such as the properties of the supermassive black hole, the broad line region, and the dusty torus. In this review, we present the results of the project "Astrophysical spectroscopy of extragalactic objects", from the observations, data processing and analysis, to the modelling of different regions in AGN.