Stuttgart 2012 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 16: Astrophysik I

EP 16.2: Talk

Thursday, March 15, 2012, 10:45–11:00, V55.21

The blazar-sequence as blazar evolution? — •Matthias Weidinger and Felix Spanier — ITPA, Campus Hubland Nord, Universität Würzburg, Emil-Fischer-Str. 31, 97074 Würzburg

The dominating radiation processes leading to the second peak in the typical double humped blazar spectra as well as the differences in Flat Spectrum Radio Quasars and BL Lac objects have been puzzling for years now. An evolutionary scenario is presented giving rise to the features of the vast types of sources along the blazar-sequence as the gas-density in the subjacent galaxy decreases and hence the accretion rate declines. In the applied consistent, time dependent hybrid (i.e. leptonic and hadronic processes are considered) emission model this leads to a abating magnetic field of the considered emitting region allowing more and more protons to escape. The blazar-sequence is thus consistently explained as the hadronicness of the relativistic outflow. This naturally leads to a dichotomy in various manifestations of Active Galactic Nuclei often observed.