Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gamma-ray blazars near equipartition and the origin of the GeV spectral
  break in 3C 454.3   Observations performed with the Fermi-LAT telescope have revealed the
presence of a spectral break in the GeV spectrum of flat-spectrum radio quasars
(FSRQs) and other low- and intermediate-synchrotron peaked blazars. We propose
that this feature can be explained by Compton scattering of broad-line region
(BLR) photons by a non-thermal population of electrons described by a
log-parabolic function. We consider in particular a scenario in which the
energy densities of particles, magnetic field, and soft photons in the emitting
region are close to equipartition. We show that this model can satisfactorily
account for the overall spectral energy distribution of the FSRQ 3C 454.3,
reproducing the GeV spectal cutoff due to Klein-Nishina effects and a curving
electron distribution.

19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics