Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modeling of the gamma-ray pulsed spectra of Geminga, Crab, and Vela with
  synchro-curvature radiation   $\gamma$-ray spectra of pulsars have been mostly studied in a
phenomenological way, by fitting them to a cut-off power-law function. Here, we
analyze a model where pulsed emission comes from synchro-curvature processes in
a gap. We calculate the variation of kinetic energy of magnetospheric particles
along the gap and the associated radiated spectra, considering an effective
particle distribution. We fit the phase-averaged and phase-resolved Fermi-LAT
spectra of the three brightest gamma-ray pulsars: Geminga, Crab, and Vela, and
constrain the three free parameters we leave free in the model. Our best-fit
models well reproduce the observed data, apart from residuals above a few GeV
in some cases, range for which the inverse Compton scattering likely becomes
the dominant mechanism. In any case, the flat slope at low-energy (< GeV) seen
by Fermi-LAT both in the phase-averaged and phase-resolved spectra of most
pulsars, including the ones we studied, requires that most of the detected
radiation below ~ GeV is produced during the beginning of the particle
trajectories, when radiation mostly come from the loss of perpendicular
momentum.

34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
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The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
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The categories of this paper are: supr-con
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The categories of this paper are: stat
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga