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Probing dark energy anisotropy

Title
Probing dark energy anisotropy
Authors
Appleby S.A.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
Wide area cosmological surveys enable investigation of whether dark energy properties are the same in different directions on the sky. Cosmic microwave background observations strongly restrict any dynamical effects from anisotropy, in an integrated sense. For more local constraints we compute limits from simulated distance measurements for various distributions of survey fields in a Bianchi I anisotropic universe. We then consider the effects of fitting for line of sight properties where isotropic dynamics is assumed (testing the accuracy through simulations) and compare sensitivities of observational probes for anisotropies, from astrophysical systematics as well as dark energy. We also point out some interesting features of anisotropic expansion in Bianchi I cosmology. © 2013 American Physical Society.
DOI
10.1103/PhysRevD.87.023532
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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