Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Skewed exponential pairwise velocities from Gaussian initial conditions   Using an Eulerian perturbative calculation, we show that the distribution of
relative pairwise velocities which arises from gravitational instability of
Gaussian density fluctuations has asymmetric (skewed) exponential tails. The
negative skewness is induced by the negative mean streaming velocity of pairs
(the infall prevails over expansion), while the exponential tails arise because
the relative pairwise velocity is a number, not volume weighted statistic. The
derived probability distribution is compared with N-body simulations and shown
to provide a reasonable fit.

22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con