Compact variable extragalactic objects and small-pitch-angle synchrotron theory

Details Compact variable extragalactic objects and small-pitch-angle synchrotron theory Compact variable extragalactic objects and small-pitch-angle synchrotron theory

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...229..503c&link_type=abstract

Astrophysical Journal, Part 1, vol. 229, Apr. 15, 1979, p. 503-508.

Astronomy and Astrophysics

Astrophysics

2

Astronomical Models, Extragalactic Radio Sources, High Energy Electrons, Synchrotron Radiation, Centimeter Waves, Earth Magnetosphere, Infrared Radiation, Pitch (Inclination)

Scientific paper

A small-pitch-angle synchrotron radiation model of luminous compact variable radio sources is applied to a large class of such objects. The model consists of a massive spinning object endowed with an extended magnetosphere. The electrons are accelerated near its surface by a strong electric field, spiral along the field lines, and lose their energy by the small-pitch-angle synchrotron process responsible for the observed centimeter and infrared radiation. The model adequately explains the observed variability of the majority of compact sources for (rest frame) frequencies greater than about 10 GHz. The model is not able to account for the variability of sources at lower frequencies, indicating clearly that an investigation of alternative radiation mechanisms or relativistic effects resulting from bulk motion is necessary.

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