Journal Article

Is the CMB shift parameter connected with the growth of cosmological perturbations?

S. Basilakos, S. Nesseris and L. Perivolaropoulos

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 387, issue 3, pages 1126-1130
Published in print July 2008 | ISSN: 0035-8711
Published online May 2008 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2008.13303.x
Is the CMB shift parameter connected with the growth of cosmological perturbations?

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We verify numerically that in the context of general relativity (GR), flat models which have the same Ωm and cosmic microwave background (CMB) shift parameter R but different H(a) and w(a) also have very similar (within less than 8 per cent) growth of perturbations even though the dark energy density evolution is quite different. This provides a direct connection between geometrical and dynamical tests of dark energy and may be used as a cosmological test of GR.

Keywords: cosmic microwave background; large-scale structure of Universe

Journal Article.  3258 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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