The origin of the infrared emission in radio galaxies. III. Analysis of 3CRR objects

Understand

We present Spitzer photometric data for a complete sample of 19 low redshift (z<0.1) 3CRR radio galaxies as part of our efforts to understand the origin of the prodigious mid- to far-infrared (MFIR) emission from radio-loud AGN.

• Our results show a correlation between AGN power (indicated by [OIII] 5007 emission line luminosity) and 24 micron luminosity.
• This result is consistent with the 24 micron thermal emission originating from warm dust heated directly by AGN illumination.
• Applying the same correlation test for 70 micron luminosity against [OIII] luminosity we find this relation to suffer from increased scatter compared to that of 24 micron.