A Concise Introduction to Perturbation Theory in Cosmology

Details A Concise Introduction to Perturbation Theory in Cosmology A Concise Introduction to Perturbation Theory in Cosmology

2008-04-21

arxiv.org/abs/0804.3276v2

Class.Quant.Grav.25:193001,2008

Astronomy and Astrophysics

Astrophysics

revtex4, 16 pages, 3 figures; v2: minor changes, typos corrected, reference added, version accepted by CQG

Scientific paper

10.1088/0264-9381/25/19/193001

We give a concise, self-contained introduction to perturbation theory in cosmology at linear and second order, striking a balance between mathematical rigour and usability. In particular we discuss gauge issues and the active and passive approach to calculating gauge transformations. We also construct gauge-invariant variables, including the second order tensor perturbation on uniform curvature hypersurfaces.

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