Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Waves, Coriolis force and the dynamo effect   Dynamo activity caused by waves in a rotating magneto-plasma is investigated.
In astrophysical environments such as accretion disks and at sufficiently small
spatial scales, the Hall effect is likely to play an important role. It is
shown that a combination of the Coriolis force and Hall effect can produce a
finite $\alpha$-effect by generating net helicity in the small scales. The
shear/ion-cyclotron normal mode of the Hall plasma is the dominant contributor
to the dynamo action for short scale motions.

26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
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
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin