# Radio-Infrared Correlation for Local Dusty Galaxies and Dusty AGNs from the AKARI All Sky Survey

## TL;DR

This study investigates the far-infrared-radio correlation in local galaxies and AGNs using AKARI, NVSS, and SDSS data, revealing differences among galaxy types and the limitations of FIRC as an AGN indicator.

## Contribution

It provides a detailed analysis of the FIRC across different galaxy types and assesses its effectiveness in distinguishing star-forming galaxies from AGNs.

## Key findings

- Seyfert galaxies show the lowest FIR/radio flux ratios.
- Seyfert galaxies exhibit excess radio emission compared to SFGs.
- FIRC can only effectively separate SFGs and AGNs for radio-loud objects.

## Abstract

We use the new release of the AKARI Far-Infrared all sky Survey matched with the NVSS radio database to investigate the local ($z<0.25$) far infrared-radio correlation (FIRC) of different types of extragalactic sources. To obtain the redshift information for the AKARI FIS sources we crossmatch the catalogue with the SDSS DR8. This also allows us to use emission line properties to divide sources into four categories: i) star-forming galaxies (SFGs), ii) composite galaxies (displaying both star-formation and active nucleus components), iii) Seyfert galaxies, and iv) low-ionization nuclear emission-line region (LINER) galaxies. We find that the Seyfert galaxies have the lowest FIR/radio flux ratios and display excess radio emission when compared to the SFGs. We conclude that FIRC can be used to separate SFGs and AGNs only for the most radio-loud objects.