Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamics of dark energy in collapsing halo of dark matter   We investigate the non-linear evolution of spherical density and velocity
perturbations of dark matter and dark energy in the expanding Universe. For
that we have used the conservation and Einstein equations to describe the
evolution of gravitationally coupled inhomogeneities of dark matter, dark
energy and radiation from linear stage in the early Universe to the non-linear
one at the current epoch. The simple method of the numerical integration of the
system of non-linear differential equations for evolution of the central part
of halo is proposed. The results are presented for halo of cluster ($k=2$
Mpc$^{-1}$) and supercluster scales ($k=0.2$ Mpc$^{-1}$) and show that
quintessential scalar field dark energy with small value of effective speed of
sound $c_s<0.1$ can give noticeable impact on the formation of large scale
structures in the expanding Universe.

9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol