TeV blazar gamma-ray emission produced by a cooling pile-up particle energy distribution function

Details TeV blazar gamma-ray emission produced by a cooling pile-up particle energy distribution function TeV blazar gamma-ray emission produced by a cooling pile-up particle energy distribution function

2004-08-12

arxiv.org/abs/astro-ph/0408218v1

Astrophys.J. 616 (2004) 136-146

Astronomy and Astrophysics

Astrophysics

29 pages, 6 figures, accepted for publication in Astrophysical Journal

Scientific paper

10.1086/424905

We propose a time-dependent one-zone model based on a quasi-Maxwellian `pile-up' distribution in order to explain the time-averaged high energy emission of TeV blazars. The instantaneous spectra are the result of the synchrotron and synchrotron self-Compton emission (SSC) of ultra-relativistic leptons. The particle energy distribution function (EDF) is computed in a self-consistent way, taking into account an injection term of fresh particles, a possible pair creation term, and the particles radiative cooling. The source term is not a usual power-law but rather a `pile-up' distribution, which can result from the combination of a stochastic heating via second order Fermi process and radiative cooling. To validate this approach, we have performed time-averaged fits of the well-known TeV emitter Mrk 501 during the 1997 flaring activity period taking into account the attenuation of the high energy component by cosmic diffuse infrared background (DIrB) and intrinsic absorption via the pair creation process. The model can reproduce very satisfactorily the observed spectral energy distribution (SED). A high Lorentz factor is required to avoid strong pair production; in the case of smaller Lorentz factor, an intense flare in the GeV range is predicted due to the sudden increase of soft photons density below the Klein-Nishina threshold. The possible relevance of such a scenario is discussed.

Affiliated with

Also associated with

No associations

Rating

TeV blazar gamma-ray emission produced by a cooling pile-up particle energy distribution function does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with TeV blazar gamma-ray emission produced by a cooling pile-up particle energy distribution function, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and TeV blazar gamma-ray emission produced by a cooling pile-up particle energy distribution function will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-574279