Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-04-06
Astrophys.J. 611 (2004) L9-L12
Astronomy and Astrophysics
Astrophysics
Clarified this and earier treatment of Tavecchio et al. (2000); removed self-absorption section; 6 pages, 2 figures, ApJ Lette
Scientific paper
10.1086/423667
Analytic approximations for synchrotron, synchrotron self-Compton (SSC), and external Compton (EC) processes are used to constrain model parameters for knot and hot-spot emission in extended jets of radio galaxies. Equipartition formulas are derived that relate the Doppler factor $\delta$ and comoving magnetic field $B$ assuming a nonthermal synchrotron origin of the radio emission, and synchrotron, SSC and EC origins of the X-ray emission. Expressions are also derived for $\delta$ and $B$ that minimize the total jet powers of the emitting region in synchrotron, SSC and EC models for the X-ray emission. The results are applied to knot WK7.8 of PKS 0637-752. Predictions to test two-component synchrotron and EC models are made for {\it Chandra} and {\it GLAST}.
Atoyan Armen
Dermer Charles D.
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