Solutions of gauge invariant cosmological perturbations in long-wavelength limit

Details Solutions of gauge invariant cosmological perturbations in long-wavelength limit Solutions of gauge invariant cosmological perturbations in long-wavelength limit

1998-01-09

arxiv.org/abs/gr-qc/9801021v2

Class.Quant.Grav. 15 (1998) 2761-2772

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

17 pages, will appear in Classical and Quantum Gravity

Scientific paper

10.1088/0264-9381/15/9/021

We investigate gauge invariant cosmological perturbations in a spatially flat Friedman-Robertson-Walker universe with scalar fields. It is well known that the evolution equation for the gauge invariant quantities has exact solutions in the long-wavelength limit. We find that these gauge invariant solutions can be obtained by differentiating the background solution with respect to parameters contained in the background system. This method is very useful when we analyze the long-wavelength behavior of cosmological perturbation with multiple scalar fields.

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