Local void vs dark energy: confrontation with WMAP and type Ia supernovae

By S. Alexander, Tirthabir Biswas, A. Notari, D. Vaid. 2007

156 citations recorded by the source corpus.

It is now a known fact that if we happen to be living in the middle of a large underdense region, then we will observe an ``apparent acceleration'', even when any form of dark energy is absent. In this paper, we present a ``Minimal Void'' scenario, i.e. a ``void'' with minimal underdensity contrast (of about -0.4) and radius (~ 200−250 Mpc/h) that can, not only explain the supernovae data, but also be consistent with the 3-yr WMAP data. We also discuss consistency of our model with various other measurements, and in particular consistency with local measurements of the Hubble parameter. We also point out possible observable signatures.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/07650a8eb30f5425e692d8ca7afa3652a441c384

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. Juan García-Bellido
2. T. Haugbølle
3. B. Carr
4. Florian Kuhnel
5. J. Silk
6. Marco Peloso
7. H. Veermae
8. M. Raidal

In Instrumentation

1. Juan García-Bellido
2. T. Haugbølle
3. B. Carr
4. J. Silk

Citations in the corpus

• Confronting Lemaitre–Tolman–Bondi models with observational cosmology (2008, methodology): “stein-de Sitter models that do fit the WMAP3 CMB observations using a non standard primordial spectrum and a hot neutrino component (e.g. [43]). Very recently an LTB model similar to ours was proposed [44] and the authors managed to make a reasonable fit to the full WMAP TT and TE data by adding a run”