Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the internal structure of the current sheet in the pulsar wind   We investigate the internal structure of the current sheet in the pulsar wind
within force-free and two-fluid MHD approximations. Within the force-free
approximation we obtain general asymptotic solution of the Grad-Shafranov
equation for quasi-spherical pulsar wind up to the second order in small
parameter $\varepsilon = (\Omega r/c)^{-1}$. The solution allows an arbitrary
latitudinal structure of the radial magnetic field, including that obtained in
the numerical simulations of oblique rotators. It is also shown that the shape
of the current sheet does not depend on the latitudinal structure. For the
internal region of the current sheet outside the fast magnetosonic surface
where the force-free approximation is not valid we use two-fluid MHD
approximation. Carrying out calculations in the comoving reference frame we
succeed in determining intrinsic electric and magnetic fields of a sheet. It
allows us to analyze time-dependent effects which were not investigated up to
now. In particular, we estimate the efficiency of the particle acceleration
inside the sheet. Finally, after investigating the motion of individual
particles in the time-dependent current sheet, we find self-consistently the
width of the sheet and its time evolution.

16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph