The importance of submillimetre observations of radio quiet and radio loud AGN's.

Astronomy and Astrophysics – Astronomy

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Active Galactic Nuclei: Sub-Mm Radiation, Active Galactic Nuclei: Radiation Mechanisms, Quasars: Sub-Mm Radiation

Scientific paper

Galaxies such as NGC 253 and M82 radiate strongly in the far infrared part of the spectrum. They produce the typical thermal emission which is also now seen in a wide range of galaxies and is a sign of extensive star formation. Radio quiet quasars and Seyfert 1 galaxies show a spectral turnover in the far infrared but whether this emission is thermal or due to nonthermal synchrotron emission is a matter of debate. Submillimetre observations are required to differentiate between these two processes. Radio loud active galaxies, in particular Blazars, have non-themal spectra which become optically thin at about 1 mm. Monitoring this emission can provide crucial tests of the emission mechanisms of the relativistic jets believed to power these exotic objects.

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