Near-horizon solution for Dvali-Gabadadze-Porrati perturbations

Journal Article · Thu Mar 15 00:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.064002· OSTI ID:21020148

Sawicki, Ignacy ^[1]; Song, Yong-Seon; Hu, Wayne ^[1]

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1. Kavli Institute for Cosmological Physics, Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)

We develop a scaling ansatz for the master equation in Dvali, Gabadadze, Porrati cosmologies, which allows us to solve the equations of motion for perturbations off the brane during periods when the on-brane evolution is scale free. This allows us to understand the behavior of the gravitational potentials outside the horizon at high redshifts and close to the horizon today. We confirm that the results of Koyama and Maartens are valid at scales relevant for observations such as galaxy-ISW correlations. At larger scales, there is an additional suppression of the potential which reduces the growth rate even further and would strengthen the integrated Sachs-Wolf effect.

• OSTI ID: 21020148
• Journal Information: Physical Review. D, Particles Fields, Vol. 75, Issue 6; Other Information: DOI: 10.1103/PhysRevD.75.064002; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANES
CORRELATIONS
COSMOLOGY
DISTURBANCES
EQUATIONS OF MOTION
FIELD EQUATIONS
GALAXIES
MATHEMATICAL SOLUTIONS
POTENTIALS
QUANTUM FIELD THEORY
SCALING LAWS