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

被引：97

作者：

Alexander, Stephon ^{[1
]}

Biswas, Tirthabir ^{[1
]}

Notari, Alessio ^{[2
,3
]}

Vaid, Deepak ^{[1
]}

机构：

[1] Penn State Univ, Dept Phys, Inst Gravitat & Cosmos, University Pk, PA 16802 USA

[2] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[3] CERN, Div Theory, CH-1211 Geneva 23, Switzerland

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2009年 / 09期

关键词：

superclusters; cosmological parameters from CMBR; dark energy theory; cosmic flows; MICROWAVE-ANISOTROPY-PROBE; INTEGRATED SACHS-WOLFE; GAUSSIAN COLD SPOT; HUBBLE CONSTANT; COSMOLOGICAL CONSTANT; STAR-FORMATION; BACKGROUND ANOMALIES; COSMIC REIONIZATION; DISTANCE SCALE; IA SUPERNOVAE;

D O I：

10.1088/1475-7516/2009/09/025

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 (similar to 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.

引用

页数：25

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