ar X iv : a st ro - p h / 99 03 28 0 v 1 1 8 M ar 1 99 9 MODELS OF VARIABILITY IN BLAZAR JETS
نویسندگان
چکیده
We present the expected variability features in the context of the Synchro-Self-Compton (SSC) model of emission from Active Galactic Nuclei (AGNs). We show that the homogeneous SSC model can describe well the observed mul-tiwavelength spectrum and variability of objects such as Mkn 421 and Mkn 501; however in order to explain the very fast flaring timescales occasionally observed from these objects one should use a laminar, rather than spherical, source geometry. This picture leads naturally to a shock-in-jet model which we approach as a site of diffusive particle acceleration. We show that this acceleration scheme can explain certain characteristic features of AGN X-ray spectra and can provide us with further observational tests.
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