Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generation and evolution of stable stellar magnetic fields in young
  A-type stars   While the presence of magnetic fields on low-mass stars is attributed to a
dynamo process essentially driven by convective motions, the existence of
magnetic fields on intermediate-mass stars has very likely other reasons.
Presuming that the fields we see are nearly constant in time, the paper focuses
on the generation of stable magnetic configurations at the early stages of
stellar evolution. The convective processing of an initial magnetic field
during the pre-main-sequence phase is studied in a very simple model star.
Azimuthal magnetic fields are found to be typical remnants in the upcoming
radiative envelope after the convection has receded.

32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
18
The categories of this paper are: econ