Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Systematical study of pulsar light curves with special relativistic
  effects   We systematically study pulsar light curves, taking into account the special
relativistic effect, i.e., the Doppler factor due to the fast spin of the
neutron stars, together with the time delay, which comes from the difference of
the travel times depending on the position of the spots. For this purpose,
first we derive the basic equations with the general expression of the metric
for the static, spherically symmetric spacetime, where for simplicity we adopt
the pointlike spot approximation for the antipodal spots associated with the
magnetic polar cap model. Then, we calculate the light curves from the neutron
star models in general relativity, with various angle between rotational and
magnetic axes and the inclination angle. As the results, unlike the case for a
slowly rotating stellar model, we find that the light curve from a fast
rotating stellar model depends not only the stellar compactness but also the
stellar radius. We also find that the amplitude of the light curve becomes
larger as the stellar radius increases and as the stellar compactness
decreases. Thus, via careful observations of the light curves from the rotating
neutron star, one would determine the stellar compactness together with the
stellar radius, if it rotates fast enough.

9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys