Constraints on the Physical Parameters of TeV Blazars

Details Constraints on the Physical Parameters of TeV Blazars Constraints on the Physical Parameters of TeV Blazars

1998-09-04

arxiv.org/abs/astro-ph/9809051v1

Astronomy and Astrophysics

Astrophysics

36 pages, incl. 6 figures in PS format, AAS LaTeX, to be published in ApJ, Dec 1998

Scientific paper

10.1086/306526

We consider the constraints on the physical parameters of a homogeneous SSC model that can be derived from the spectral shape and variability of TeV blazars. Assuming that the relativistic electron spectrum is a broken power law, where the break energy $\gamma_b$ is a free parameter, we write the analytical formulae that allow to connect the physical parameters of the model to observable quantities. The constraints can be summarized in a plane where the coordinates are the Doppler factor and the magnetic field. The consistency between the break energy and the balance between cooling and escape and the interpretation of the soft photon lags measured in some sources as radiative cooling times are treated as additional independent constraints. We apply themethod to the case of three well known blazars, PKS 2155-304, Mrk 421 and Mrk 501.

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