Inhomogeneous synchrotron-self-Compton models and the problem of relativistic beaming of BL Lac objects

Details Inhomogeneous synchrotron-self-Compton models and the problem of relativistic beaming of BL Lac objects Inhomogeneous synchrotron-self-Compton models and the problem of relativistic beaming of BL Lac objects

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...146..204g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 146, no. 2, May 1985, p. 204-212.

Astronomy and Astrophysics

Astrophysics

207

Astronomical Models, Bl Lacertae Objects, Compton Effect, Relativistic Electron Beams, Synchrotron Radiation, X Ray Spectra, Electron Density (Concentration), Electron Energy, Emission Spectra, Infrared Spectra, Plasma Jets, Radiant Flux Density, Visible Spectrum

Scientific paper

In the present formalism for synchrotron-self-Compton spectrum production by a large class of elongated, inhomogeneous jet sources, the relativistic electron density, maximum electron energy, and magnetic field, are assumed to be power law functions of a radial coordinate. Attention is given to characteristics of spectra resulting from various choices made for the radial dependences of the physical quantities, and it is noted that if the maximum radiated frequency decreases and spectral emissivity increases with increasing distance, the main features of IR to X-ray spectra can be explained for BL Lac objects, without the need of relativistic bulk motion. However, only conical geometries can naturally produce flat radio spectra, as observed in this class of objects; an emission region with inner parabolic structure which becomes conical towards the exterior is therefore proposed, consistent with jet physical models. The formalism is applied to the BL Lac objects PKS 2155 - 304 and PKS 0537 - 441.

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