Abstract
We are performing a survey of powerful 3CR radio galaxies and quasars in the mid-infrared. The purpose is to test for the presence of a powerful hidden quasar-like thermal nucleus by measuring the ‘waste heat’ that must be emitted by any obscuring dust. The dust is treated as a calorimeter for the central engine. Three early mid-IR detections are particularly interesting: Cygnus A, M87, and Centaurus A. These are notable both as a demonstration of our technique and as an example of the great variety of objects that are classified as radio galaxies. We confirm the presence of hidden quasar-like nuclei in Cyg A and Cen A, but M87 shows only weak mid-IR emission, indicating its AGN is non-thermal, and consistent with only synchrotron emission. We also present a new near-infrared adaptive optics image of Cygnus A which shows a secondary point source.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
