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Trial of Galileon gravity by cosmological expansion and growth observations

Title
Trial of Galileon gravity by cosmological expansion and growth observations
Authors
Appleby S.Linder E.V.
Ewha Authors
Eric V. Linder
Issue Date
2012
Journal Title
Journal of Cosmology and Astroparticle Physics
ISSN
1475-7516JCR Link
Citation
vol. 2012, no. 8
Indexed
SCIE; SCOPUS WOS scopus
Abstract
Galileon gravity is a robust theoretical alternative to general relativity with a cosmological constant for explaining cosmic acceleration, with interesting properties such as having second order field equations and a shift symmetry. While either its predictions for the cosmic expansion or growth histories can approach standard ACDM, we demonstrate the incompatibility of both doing so simultaneously. Already current observational constraints can severely disfavor an entire class of Galileon gravity models that do not couple directly to matter, ruling them out as an alternative to ACDM. © 2012 IOP Publishing Ltd and Sissa Medialab srl.
DOI
10.1088/1475-7516/2012/08/026
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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