Physical conditions in polarized compact radio sources

Details Physical conditions in polarized compact radio sources Physical conditions in polarized compact radio sources

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....61..291j&link_type=abstract

Astronomy and Astrophysics, vol. 61, no. 2, Oct. 1977, p. 291-293.

Astronomy and Astrophysics

Astronomy

57

Depolarization, Electron Density (Concentration), Faraday Effect, Linear Polarization, Quasars, Radio Sources (Astronomy), Astronomical Models, Brightness Temperature, Electron Energy, High Energy Electrons, Nonthermal Radiation

Scientific paper

It is noted that the existence of observable linear polarization in compact nonthermal radio sources places severe constraints on the density of nonrelativistic electrons in the emitting regions. The relevance of such constraints with respect to physical models for the dynamics and energetics of compact radio sources is considered. An analysis of Faraday depolarization is discussed which strongly suggests that the number density of ultrarelativistic electrons with Lorentz factors of roughly 100 or more greatly exceeds that of lower-energy electrons in the emitting regions of compact nonthermal radio sources. The analysis is shown to favor source models that produce relativistic electrons through direct acceleration by such phenomena as large-scale fields or relativistic shocks.

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