# Using H$\alpha$ Filaments to Probe AGN Feedback in Galaxy Clusters

## TL;DR

This study uses 3D simulations to explore how H-alpha filament properties in galaxy clusters relate to AGN feedback, suggesting they can serve as observable probes of AGN activity and its dynamics.

## Contribution

The paper introduces a simulation-based analysis linking H-alpha filament characteristics to AGN feedback strength and directionality in galaxy clusters.

## Key findings

- Filament extent and mass correlate with AGN feedback power.
- Velocity dispersion along jet axis correlates with kinetic luminosity.
- Filament properties can serve as observable indicators of AGN activity.

## Abstract

Recent observations of giant ellipticals and brightest cluster galaxies (BCGs) provide tentative evidence for a correlation between the luminosity of the H$\alpha$ emitting gas filaments and the strength of feedback associated with the active galactic nucleus (AGN). Motivated by this, we use 3D radiation-hydrodynamic simulations with the code Enzo to examine and quantify the relationship between the observable properties of the H$\alpha$ filaments and the kinetic and radiative feedback from supermassive black holes in BCGs. We find that the spatial extent and total mass of the filaments show positive correlations with AGN feedback power and can therefore be used as probes of the AGN activity. We also examine the relationship between the AGN feedback power and velocity dispersion of the H$\alpha$ filaments and find that the kinetic luminosity shows statistically significant correlation with the component of the velocity dispersion along the jet axis but not the components perpendicular to it.