Influence of gravitational microlensing on broad absorption lines of QSOs: The case of the Fe K$\alpha$ line

TL;DR

This paper investigates how gravitational microlensing affects the broad absorption lines, especially Fe Kα, in lensed QSOs by modeling accretion disks and absorption regions to understand line shape variations.

Contribution

It introduces a detailed model of microlensing impact on broad absorption lines in QSOs, focusing on the Fe Kα line and analyzing line shape variations due to microlensing effects.

Findings

Microlensing can alter both emission and absorption components of spectral lines.

Line shape variations depend on the sizes of emission and absorption regions.

Realistic microlensing patterns influence spectral line profiles.

Abstract

Here we give a brief overview of some investigations of the gravitational microlensing influence on broad absorption spectral lines of lensed QSOs. Especially, we consider the microlensing influence on the Fe K$\alpha$ broad absorption lines using a model of an accretion disk covered by an absorption region. Gravitational microlensing is modeled by ray shooting method which enables us to obtain realistic microlensing patterns. We obtain that microlensing can affect both emission and absorption component of line that depends on dimensions on emission and absorption line regions. Here we give detailed analysis of emission and absorption line shape variations due to gravitational microlensing.