1 millimeter continuum observations of quasars

Astronomy and Astrophysics – Astronomy

Scientific paper

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Bl Lacertae Objects, Continuous Radiation, Infrared Radiation, Quasars, Radio Astronomy, Astronomical Models, Blazars, Flux Density, Millimeter Waves, Radio Emission, Radio Sources (Astronomy), Relativistic Particles, Synchrotron Radiation

Scientific paper

Broadband 1-mm continuum observations of 37 active extragalactic objects are discussed in the context of several models of the radio and IR continuum emission of compact extragalactic objects. The observed correlation of the 1-mm flux density of 'blazars', or BL Lac objects and optically violent, variable quasars, with both radio and IR emission, is a natural consequence of the attribution of the radio-to-optical blazar continuum to synchrotron radiation from a relativistic jet viewed nearly along its axis. It is shown that a Comptonization model in which the IR continuum of quasars is produced by the upscattering of radio photons into the IR by a thermal plasma will be in accord with the 1-mm and IR data, if these photons have frequencies in the 10 to the 12th to 10 to the 13th Hz range.

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