Probing dark energy with redshift drift

被引：44

作者：

Martinelli, Matteo ^{[1
,2
]}

Pandolfi, Stefania ^{[3
]}

Martins, C. J. A. P. ^{[4
]}

Vielzeuf, P. E. ^{[4
,5
,6
]}

机构：

[1] SISSA, I-34136 Trieste, Italy

[2] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy

[3] Univ Copnehagen, Dark Cosmol Ctr, Niels Bohr Istitute, DK-2100 Copenhagen, Denmark

[4] Univ Porto, Ctr Astrofis, P-4150762 Oporto, Portugal

[5] Univ Porto, Fac Ciencias, P-4169007 Oporto, Portugal

[6] Univ Toulouse 3, F-31062 Toulouse 9, France

来源：

PHYSICAL REVIEW D | 2012年 / 86卷 / 12期

基金：

新加坡国家研究基金会;

关键词：

COSMOLOGICAL PARAMETERS; DECELERATION;

D O I：

10.1103/PhysRevD.86.123001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Future redshift-drift measurements (also known as the Sandage-Loeb signal) will be crucial to probe the so called "redshift desert," thus providing a new tool for cosmological studies. In this paper we quantify the ability of a future measurement of the Sandage-Loeb signal by a Cosmic-Dynamics-Experiment-like spectrograph to constrain a phenomenological parametrization of dynamical dark energy, specifically by obtaining constraints on w(0) and w(a). We also demonstrate that if used alongside CMB data, the Sandage-Loeb measurements will be able to break degeneracies between expansion parameters, thus greatly improving cosmological constraints.

引用

页数：7

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