7 papers
Radio-submm flares from blazars in a discontinuous jet model
Jörg P. Rachen, Max Häberlein, Felix Reimold +1
We present a model in which AGN jets are described by a dense series of plasma blobs, distributed in masses and velocities. The blobs expand and collide, and ultimately form a cont…
Hadronic Correlated Flares from Mrk 501
Jorg P. Rachen
We discuss the possibility of explaining the extraordinary, correlated X-ray/TeV flares observed during April 1997 from Mrk 501, by synchrotron-pair cascades injected by synchrotro…
Hadronic blazar models and correlated X-ray/TeV flares
Jorg P. Rachen
The hypothesis that AGN jets might be the sources of the ultra-high energy cosmic rays has originally motivated the venture of TeV gamma ray astronomy. Surprisingly, after the disc…
Monte-Carlo simulations of photohadronic processes in astrophysics
A. Muecke, Ralph Engel, J. P. Rachen +2
A new Monte Carlo program for photohadronic interactions of relativistic nucleons with an ambient photon radiation field is presented. The event generator is designed to fulfil typ…
Propagation of UHE cosmic rays in a structured universe
Jorg P. Rachen
In a gravitationally unstable universe, the structure of dark matter and galaxies, intergalactic gas and magnetic field can have severe impact on the propagation of ultra high ener…
The arrival directions of the most energetic cosmic rays
Todor Stanev, Peter Biermann, Jeremy Lloyd-Evans +2
In this Letter we examine the arrival directions of the most energetic cosmic rays (E > 2 * 10^19 eV) detected by several air shower experiments. We find that data taken by differe…