Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A hydrodynamical trigger mechanism for pulsar glitches   The standard explanation for large pulsar glitches involves transfer of
angular momentum from an internal superfluid component to the star's crust.
This model requires an instability to trigger the sudden unpinning of the
vortices by means of which the superfluid rotates. This Letter describes a new
instability that may play this role. The instability, which is associated with
the inertial r-modes of a superfluid neutron star, sets in once the rotational
lag in the system reaches a critical level. We demonstrate that our model is in
good agreement with observed glitch data, suggesting that the superfluid r-mode
instability may indeed be the mechanism that triggers large pulsar glitches.

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The categories of this paper are: eess
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
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The categories of this paper are: acc-phys
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
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The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: chem-ph