Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic field evolution in relativistic unmagnetized collisionless
  shocks   We study relativistic unmagnetized collisionless shocks using unprecedentedly
large particle-in-cell simulations of two-dimensional pair plasma. High energy
particles accelerated by the shock are found to drive magnetic field evolution
on a timescale >10^4 plasma times. Progressively stronger magnetic fields are
generated on larger scales in a growing region around the shock.
Shock-generated magnetic fields and accelerated particles carry >1% and >10% of
the downstream energy flux, respectively. Our results suggest limits on the
magnetization of relativistic astrophysical flows.

11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
2
The categories of this paper are: math