We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
The time-dependent one-zone hadronic model First principles.
- Authors
Dimitrakoudis, S.; Mastichiadis, A.; Protheroe, R.J.; Reimer, A.
- Abstract
We present a time-dependent approach to the one-zone hadronic model in the case where the photon spectrum is produced by ultrarelativistic protons interacting with soft photons that are produced from protons and low magnetic fields. Assuming that protons are injected at a certain rate in a homogeneous spherical volume containing a magnetic field, the evolution of the system can be described by five coupled kinetic equations, for protons, electrons, photons, neutrons, and neutrinos. Photopair and photopion interactions are modelled using the results of Monte-Carlo simulations and, in particular, from the SOPHIA code for the latter. The coupling of energy losses and injection introduces a self-consistency in our approach and allows the study of the comparative relevancy of processes at various conditions, the efficiency of the conversion of proton luminosity to radiation, the resulting neutrino spectra, and the effects of time variability on proton injection, among other topics. We present some characteristic examples of the temporal behaviour of the system and show that this can be very different from the one exhibited by leptonic models. Furthermore, we argue that, contrary to the wide-held belief, there are parameter regimes where the hadronic models can become quite efficient. However, to keep the free parameters at a minimum and facilitate an in-depth study of the system, we have only concentrated on the case where protons are injected; i.e., we did not consider the effects of a co-accelerated leptonic component.
- Subjects
HADRON spectroscopy; PROTONS; MAGNETIC fields; MONTE Carlo method; RADIATIVE transfer
- Publication
Astronomy & Astrophysics / Astronomie et Astrophysique, 2012, Vol 546, Issue 1, p1
- ISSN
0004-6361
- Publication type
Article
- DOI
10.1051/0004-6361/201219770