Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relativistic effects and polarization in three high-energy pulsar models   We present the influence of the special relativistic effects of aberration
and light travel time delay on pulsar high-energy lightcurves and polarization
characteristics predicted by three models: the two-pole caustic model, the
outer gap model, and the polar cap model. Position angle curves and degree of
polarization are calculated for the models and compared with the optical data
on the Crab pulsar. The relative positions of peaks in gamma-ray and radio
lightcurves are discussed in detail for the models. We find that the two-pole
caustic model can reproduce qualitatively the optical polarization
characteristics of the Crab pulsar - fast swings of the position angle and
minima in polarization degree associated with both peaks. The anticorrelation
between the observed flux and the polarization degree (observed in the optical
band also for B0656+14) naturally results from the caustic nature of the peaks
which are produced in the model due to the superposition of radiation from many
different altitudes, ie. polarized at different angles. The two-pole caustic
model also provides an acceptable interpretation of the main features in the
Crab's radio profile. Neither the outer gap model nor the polar cap model are
able to reproduce the optical polarization data on the Crab. Although the outer
gap model is very successful in reproducing the relative positions of gamma-ray
and radio peaks in pulse profiles, it can reproduce the high-energy lightcurves
only when photon emission from regions very close to the light cylinder is
included.

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The categories of this paper are: eess
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The categories of this paper are: hep-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: econ
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
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The categories of this paper are: math
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The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-lat