Impact of the local void on the cosmological parameters

被引：1

作者：

Yu, Bo ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China

[2] Nanjing Univ, Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2013年 / 03期

基金：

中国国家自然科学基金;

关键词：

dark energy theory; supernova type Ia - standard candles; HUBBLE-BUBBLE; DARK-ENERGY; IA SUPERNOVAE;

D O I：

10.1088/1475-7516/2013/03/013

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper, I discuss the effects of a local void on the cosmological parameters. It is found that, if the supernova distance is absolutely calibrated, then the bias of all the cosmological parameters is always important, while if the supernova distance is relatively calibrated, the largest effects will appear in the dark energy equation of state. For a local void of size similar to 100Mpc, the bias effects mainly manifest in the low redshift range. Therefore, the piecewise dark energy equation of state, especially the one in the range of lowest redshift, will be more strongly affected than the constant equation of state. In order to reduce this bias in constraining the cosmological parameters, one could require the distance of all the adopted supernovas be greater than 1.2 similar to 1.5 times of the radius of the local void. In this case, the residual bias can be safely ignored.

引用

页数：18

共 33 条

[1]

Albrecht A., ASTROPH0609591 DARK

[2] Local void vs dark energy: confrontation with WMAP and type la supernovae [J].

Alexander, Stephon ;

Biswas, Tirthabir ;

Notari, Alessio ;

Vaid, Deepak .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2009, (09)

[3] Inhomogeneous alternative to dark energy? [J].

Alnes, H ;

Amarzguioui, M ;

Gron, O .

PHYSICAL REVIEW D, 2006, 73 (08)

[4] 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

[5] Testing the void against cosmological data: fitting CMB, BAO, SN and H0 [J].

Biswas, Tirthabir ;

Notari, Alessio ;

Valkenburg, Wessel .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2010, (11)

[6]

Célérier MN, 2000, ASTRON ASTROPHYS, V353, P63

[7] Accelerating universes with scaling dark matter [J].

Chevallier, M ;

Polarski, D .

INTERNATIONAL JOURNAL OF MODERN PHYSICS D, 2001, 10 (02) :213-223

[8] Is there evidence for a Hubble bubble? The nature of Type Ia Supernova colors and dust in external galaxies [J].

Conley, A. ;

Carlberg, R. G. ;

Guy, J. ;

Howell, D. A. ;

Jha, S. ;

Riess, A. G. ;

Sullivan, M. .

ASTROPHYSICAL JOURNAL, 2007, 664 (01) :L13-L16

[9] Effects of voids on the reconstruction of the equation of state of dark energy [J].

de Lavallaz, Arnaud ;

Fairbairn, Malcolm .

PHYSICAL REVIEW D, 2011, 84 (08)

[10] Lemaitre-Tolman-Bondi model and accelerating expansion [J].

Enqvist, Kari .

GENERAL RELATIVITY AND GRAVITATION, 2008, 40 (2-3) :451-466

← 1 2 3 4 →