Published November 15, 2008
| Version v1
Journal article
Description of our cosmological spacetime as a perturbed conformal Newtonian metric and implications for the backreaction proposal for the accelerating universe
- 1. Dipartimento di Fisica 'G. Galilei' Universita di Padova, INFN Sezione di Padova, via Marzolo 8, Padova I-35131 (Italy)
- 2. Kavli Institute for Cosmological Physics, the University of Chicago, Chicago, Illinois 60637-1433 (United States)
- 3. Department of Astronomy and Astrophysics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, the University of Chicago, Chicago, Illinois 60637-1433 (United States)
Description
It has been argued that the spacetime of our universe can be accurately described by a perturbed conformal Newtonian metric, and hence even large density inhomogeneities in a dust universe cannot change the observables predicted by the homogeneous dust model. In this paper we study a spherically symmetric dust model and illustrate conditions under which large spatial variations in the expansion rate can invalidate the argument.
Additional details
Identifiers
- DOI
- 10.1103/PhysRevD.78.103002;
- arXiv
- arXiv:0807.0401v3;
Publishing Information
- Journal Title
- Physical Review. D, Particles Fields
- Journal Volume
- 78
- Journal Issue
- 10
- Journal Page Range
- p. 103002-103002.15
- ISSN
- 0556-2821
- CODEN
- PRVDAQ
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 41002199
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- ACCELERATION; COSMIC DUST; COSMOLOGICAL MODELS; DENSITY; EXPANSION; SPACE-TIME; UNIVERSE; VARIATIONS
- Descriptors DEC
- DUSTS; MATHEMATICAL MODELS; PHYSICAL PROPERTIES
Optional Information
- Notes
- (c) 2008 The American Physical Society