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Model independent tests of cosmic growth versus expansion

Title
Model independent tests of cosmic growth versus expansion
Authors
Shafieloo A.Kim A.G.Linder E.V.
Ewha Authors
Eric V. Linder
Issue Date
2013
Journal Title
Physical Review D - Particles, Fields, Gravitation and Cosmology
ISSN
1550-7998JCR Link
Citation
vol. 87, no. 2
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We use Gaussian processes to map the expansion history of the universe in a model-independent manner from the Union2.1 supernovae data and then apply these reconstructed results to solve for the growth history. By comparing this to Baryon Oscillation Spectroscopic Survey and WiggleZ large-scale structure data we examine whether growth is determined wholly by expansion, with the measured gravitational growth index testing gravity without assuming a model for dark energy. A further model-independent analysis looks for redshift-dependent deviations of growth from the general relativity solution without assuming the growth index form. Both approaches give results consistent with general relativity. © 2013 American Physical Society.
DOI
10.1103/PhysRevD.87.023520
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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