Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Resonance Type Instabilities in the Gaseous Disks of the Flat Galaxies
  III. The gyroscopical resonance type instability   The stability of thin homogeneous gaseous disk with step discontinuity of
velocity and density profile has been investigated analytically in the limitary
case of large compressibility and numerically at spatially separated velocity
and density kinks. The expressions for reflection and transmission coefficients
at the axisymmetrical vortex sheet are derived. The possibility of gyroscopical
resonance type instability development in addition to Kelvin--Helmholtz and
centrifugal instabilities is shown and its physical mechanism is clarified. It
has been discussed the possibility of application of obtained results to the
stability analysis of the gaseous disks of the real flat galaxies.

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The categories of this paper are: nucl-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: physics
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The categories of this paper are: hep-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: eess
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The categories of this paper are: chem-ph