Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The role of star formation for the galactic dynamo   Magnetic field amplification by a fast dynamo is seen in local box
simulations of SN-driven ISM turbulence, where the self-consistent emergence of
large-scale fields agrees very well with its mean-field description. We
accordingly derive scaling laws of the turbulent transport coef- ficients in
dependence of the SN rate, density and rotation. These provide the input for
global simulations of regular magnetic fields in galaxies within a mean-field
MHD framework. Using a Kennicutt-Schmidt relation between the star formation
(SF) rate and midplane density, we can reduce the number of free parameters in
our global models. We consequently present dynamo models for different rotation
curves and radial density distributions.

36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph