Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Construction of Astrophysical Initial Data for Perturbations of
  Relativistic Stars   We develop a framework for constructing initial data sets for perturbations
about spherically symmetric matter distributions. This framework facilitates
setting initial data representing astrophysical sources of gravitational
radiation involving relativistic stars. The procedure is based on
Lichnerowicz-York's conformal approach to solve the constraints in Einstein's
equations. The correspondence of these initial data sets in terms of the
standard gauge perturbation variables in the Regge-Wheeler perturbation
variables is established, and examples of initial data sets of merging neutron
stars under the close-limit approximation are presented.

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The categories of this paper are: q-bio
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
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The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
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The categories of this paper are: math-ph
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The categories of this paper are: stat
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-th