Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A convection zone dynamo including the effects of magnetic buoyancy and
  downward flows   A magnetic flux tube may be considered both as a separate body and as a
confined field. As a field, it is affected both by the cyclonic convection
($\alpha$-effect) and differential rotation ($\Omega$-effect). As a body, the
tube experiences not only a buoyant force, but also a dynamic pressure due to
downflows above the tube. When these two dynamic effects are incorporated into
the $\alpha\Omega$ dynamo equations, we obtain a dynamo operating in the
convection zone. We analyze and solve the extended dynamo equations in the
linear approximation by using observed solar internal rotation and assuming a
downflow suggested by numerical simulations of the solar convection zone. The
results produce: (i) the 22-year cycle period; (ii) the extended butterfly
diagram; (iii) the confinement of strong activity to low heliographic latitudes
$|\Phi|\le 35^\circ$; (iv) at low latitudes the radial field is in an
approximately $\pi$ phase lag compared to the toroidal field at the same
latitude; (v) the poleward branch is in a $\pi/2$ phase lag with respect to the
equatorward branch; (vi) most of the magnetic flux is present in a strongly
intermittent form, concentraed into strong flux tubes; (vii) the magnetic field
peaks at a depth of $r=0.96 R_{\sun}$; (viii) total solar irradiance varies in
phase with the solar cycle activity, having an amplitude of 0.1%; (ix) solar
effective temperature varies in phase with the solar cycle activity, having an
amplitude of 1.5 $^\circ C$; and (x) solar radius also varies in phase with the
solar cycle activity, having an amplitude of 20 mas. All these results are in
agreement with the corresponding observations.

33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
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The categories of this paper are: econ
8
The categories of this paper are: hep-ex
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The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
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The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
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The categories of this paper are: chao-dyn
3
The categories of this paper are: physics