# A New Diagnostic to Separate Line Emission from Star Formation, Shocks, and AGN Simultaneously in IFU Data

## TL;DR

This paper introduces a novel 3D diagnostic tool for IFU data that effectively distinguishes line emissions from star formation, shocks, and AGN within galaxies, improving upon previous methods.

## Contribution

The paper presents a new three-dimensional diagnostic diagram that simultaneously separates emission sources from star formation, shocks, and AGN in galaxy spectra.

## Key findings

- AGN-dominated regions correlate with hard X-ray emission in NGC 1068.
- Shock-dominated regions align with high velocity dispersion areas.
- The diagnostic accurately identifies different emission sources in IFU data.

## Abstract

In the optical spectra of galaxies, methods for the separation of line emission arising from star formation and an additional hard component, such as shocks or AGN, is well-understood and possible with current diagnostics. However, such diagnostics fail when attempting to separate and define line emission which arises from shocked gas, and that arising from AGN. We present a new three-dimensional diagnostic diagram for IFU data which can simultaneously separate the line emission amongst star formation, shocks, and AGN within a galaxy. We show that regions we define as AGN-dominated correlate well with the hard X-ray distribution in our test case NGC 1068, as well as with known regions of AGN activity in NGC 1068. Similarly, spaxels defined as shock-dominated correlate strongly with regions of high velocity dispersion within the galaxy.