Future CMB constraints on early, cold, or stressed dark energy

被引：75

作者：

Calabrese, Erminia ^{[1
,2
]}

de Putter, Roland ^{[3
,4
,5
]}

Huterer, Dragan ^{[6
]}

Linder, Eric V. ^{[5
,7
]}

Melchiorri, Alessandro ^{[1
,2
]}

机构：

[1] Univ Roma La Sapienza, Dept Phys, I-00185 Rome, Italy

[2] Univ Roma La Sapienza, Ist Nazl Fis Nucl, I-00185 Rome, Italy

[3] Univ Valencia, CSIC, IFIC, Valencia, Spain

[4] Inst Ciencies Cosmos, Barcelona, Spain

[5] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[6] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[7] Ewha Womans Univ, Inst Early Universe, Seoul, South Korea

来源：

PHYSICAL REVIEW D | 2011年 / 83卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

MICROWAVE BACKGROUND ANISOTROPIES; POWER SPECTRUM; SUPERNOVAE;

D O I：

10.1103/PhysRevD.83.023011

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate future constraints on early dark energy (EDE) achievable by the Planck and CMBPol experiments, including cosmic microwave background (CMB) lensing. For the dark energy, we include the possibility of clustering through a sound speed c(s)(2) < 1 (cold dark energy) and anisotropic stresses parametrized with a viscosity parameter c(vis)(2). We discuss the degeneracies between cosmological parameters and EDE parameters. In particular we show that the presence of anisotropic stresses in EDE models can substantially undermine the determination of the EDE sound speed parameter c(s)(2). The constraints on EDE primordial energy density are however unaffected. We also calculate the future CMB constraints on neutrino masses and find that they are weakened by a factor of 2 when allowing for the presence of EDE, and highly biased if it is incorrectly ignored.

引用

页数：11

共 48 条

[1]

ALAM U, ARXIV10040437

[2] SPECTRA AND HUBBLE SPACE TELESCOPE LIGHT CURVES OF SIX TYPE Ia SUPERNOVAE AT 0.511 < z < 1.12 AND THE UNION2 COMPILATION [J].

Amanullah, R. ;

Lidman, C. ;

Rubin, D. ;

Aldering, G. ;

Astier, P. ;

Barbary, K. ;

Burns, M. S. ;

Conley, A. ;

Dawson, K. S. ;

Deustua, S. E. ;

Doi, M. ;

Fabbro, S. ;

Faccioli, L. ;

Fakhouri, H. K. ;

Folatelli, G. ;

Fruchter, A. S. ;

Furusawa, H. ;

Garavini, G. ;

Goldhaber, G. ;

Goobar, A. ;

Groom, D. E. ;

Hook, I. ;

Howell, D. A. ;

Kashikawa, N. ;

Kim, A. G. ;

Knop, R. A. ;

Kowalski, M. ;

Linder, E. ;

Meyers, J. ;

Morokuma, T. ;

Nobili, S. ;

Nordin, J. ;

Nugent, P. E. ;

Ostman, L. ;

Pain, R. ;

Panagia, N. ;

Perlmutter, S. ;

Raux, J. ;

Ruiz-Lapuente, P. ;

Spadafora, A. L. ;

Strovink, M. ;

Suzuki, N. ;

Wang, L. ;

Wood-Vasey, W. M. ;

Yasuda, N. .

ASTROPHYSICAL JOURNAL, 2010, 716 (01) :712-738

[3]

[Anonymous], ARXIV09061188 EPIC C

[4]

[Anonymous], ARXIVASTROPH9804168

[5] Probing dark energy perturbations:: The dark energy equation of state and speed of sound as measured by WMAP -: art. no. 083503 [J].

Bean, R ;

Doré, O .

PHYSICAL REVIEW D, 2004, 69 (08) :8

[6]

Bond JR, 1997, MON NOT R ASTRON SOC, V291, pL33

[7] CMB lensing constraints on dark energy and modified gravity scenarios [J].

Calabrese, Erminia ;

Cooray, Asantha ;

Martinelli, Matteo ;

Melchiorri, Alessandro ;

Pagano, Luca ;

Slosar, Anze ;

Smoot, George F. .

PHYSICAL REVIEW D, 2009, 80 (10)

[8] The Physics of Cosmic Acceleration [J].

Caldwell, Robert R. ;

Kamionkowski, Marc .

ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE, 2009, 59 :397-429

[9] Dynamics of dark energy [J].

Copeland, Edmund J. ;

Sami, M. ;

Tsujikawa, Shinji .

INTERNATIONAL JOURNAL OF MODERN PHYSICS D, 2006, 15 (11) :1753-1935

[10] Delayed recombination and standard rulers [J].

De Bernardis, Francesco ;

Bean, Rachel ;

Galli, Silvia ;

Melchiorri, Alessandro ;

Silk, Joseph I. ;

Verde, Licia .

PHYSICAL REVIEW D, 2009, 79 (04)

← 1 2 3 4 5 →