Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Angular momentum distribution during the collapse of primordial
  star-forming clouds   It is generally believed that angular momentum is distributed during the
gravitational collapse of the primordial star forming cloud. However, so far
there has been little understanding of the exact details of the distribution.
We use the modified version of the Gadget-2 code, a three-dimensional
smoothed-particle hydrodynamics simulation, to follow the evolution of the
collapsing gas in both idealized as well as more realistic minihalos. We find
that, despite the lack of any initial turbulence and magnetic fields in the
clouds the angular momentum profile follows the same characteristic power-law
that has been reported in studies that employed fully self-consistent
cosmological initial conditions. The fit of the power-law appears to be roughly
constant regardless of the initial rotation of the cloud. We conclude that the
specific angular momentum of the self-gravitating rotating gas in the
primordial minihalos maintains a scaling relation with the gas mass as $L
\propto M^{1.125}$. We also discuss the plausible mechanisms for the power-law
distribution.

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The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga