CMB anisotropies seen by an off-center observer in a spherically symmetric inhomogeneous universe
arXiv:astro-ph/0607334 · doi:10.1103/PhysRevD.74.103520
Abstract
The current authors have previously shown that inhomogeneous, but spherically symmetric universe models containing only matter can yield a very good fit to the SNIa data and the position of the first CMB peak. In this work we examine how far away from the center of inhomogeneity the observer can be located in these models and still fit the data well. Furthermore, we investigate whether such an off-center location can explain the observed alignment of the lowest multipoles of the CMB map. We find that the observer has to be located within a radius of 15 Mpc from the center for the induced dipole to be less than that observed by the COBE satellite. But for such small displacements from the center, the induced quadru- and octopoles turn out to be insufficiently large to explain the alignment.
8 pages (REVTeX4), 7 figures; v2: minor changes, matches published version
Cited by in corpus (15)
- Confronting Lemaitre-Tolman-Bondi models with Observational Cosmology
- Lemaitre-Tolman-Bondi model and accelerating expansion
- On cosmological observables in a swiss-cheese universe
- Living in a Void: Testing the Copernican Principle with Distant Supernovae
- Looking the void in the eyes - the kSZ effect in LTB models
- Light-cone averages in a swiss-cheese universe
- Can we avoid dark energy?
- Local Void vs Dark Energy: Confrontation with WMAP and Type Ia Supernovae
- The radial BAO scale and Cosmic Shear, a new observable for Inhomogeneous Cosmologies
- Pressure gradients, shell crossing singularities and acoustic oscillations - application to inhomogeneous cosmological models
- Cosmic Parallax: possibility of detecting anisotropic expansion of the universe by very accurate astrometry measurements
- Apparent and average acceleration of the Universe
- Probing violation of the Copernican principle via the integrated Sachs-Wolfe effect
- Cosmology With A Dark Refraction Index
- Gravitational backreaction in cosmological spacetimes