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General Relativity and Quantum Cosmology, gr-qc
Abstract:
We study perturbations of Schwarzschild spacetime in a coordinate-free,
covariant form. The GHP formulation, having the advantage of not only being
covariant but also tetrad-rotation invariant, is used to write down the
previously known odd- and even-parity gauge-invariants and the equations they
satisfy. Additionally, in the even-parity sector, a new invariant and the
second order hyperbolic equation it satisfies are presented. Chandrasekhar's
work on transformations of solutions for perturbation equations on
Schwarzschild spacetime is translated into the GHP form, i.e., solutions for
the equations of the even- and odd-parity invariants are written in terms of
one another, and the extreme Weyl scalars; and solutions for the equations of
these latter invariants are also written in terms of one another. Recently,
further gauge invariants previously used by Steven Detweiler have been
described. His method is translated into GHP form and his basic invariants are
presented here. We also show how these invariants can be written in terms of
curvature invariants.
