Simultaneous synchrotron and adiabatic effects in multiply shocked jets in extended extragalactic radio sources

Details Simultaneous synchrotron and adiabatic effects in multiply shocked jets in extended extragalactic radio sources Simultaneous synchrotron and adiabatic effects in multiply shocked jets in extended extragalactic radio sources

Oct 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...434..503e&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 434, no. 2, p. 503-508

Astronomy and Astrophysics

Astronomy

Astronomical Models, Extragalactic Radio Sources, Plasma Jets, Radio Astronomy, Radio Spectra, Shock Waves, Spectral Signatures, Adiabatic Conditions, Correlation, Synchrotron Radiation

Scientific paper

As part of the effort to understand the radio spectra of extragalactic radio sources, we have incorporated the effects of simultaneous synchrotron and adiabatic processes for jet plasma crossing several shocks, which could produce multiple radio hot spots within the lobes. Oblique shocks compress the transverse component of the magnetic field and also boost the energy of the plasma within the shock regions. We make the assumption that more powerful jets typically pass through more shocks before terminating subsonically. A model incorporating these effects is able to reproduce the spectral evolution usually observed in the hot spots and lobes of high-luminosity double radio sources. Our results also support Gopal-Krishna & Wiita's view that the observed correlation between steeper indices and higher radio power results when a jet passes through a sequence of oblique shocks within the lobe of a radio source.

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