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Impact of the local void on the cosmological parameters
Yu, Bo1,2
2013-03-01
Source PublicationJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
ISSN1475-7516
Volume0Issue:3Pages:4PP
Corresponding AuthorYu, B (reprint author), Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China. Email: yubo@pmo.ac.cn
AbstractIn 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.
KeywordDark Energy Theory Supernova Type Ia - Standard Candles
Subject AreaAstronomy & AstroPhysics, Physics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/1475-7516/2013/03/013
WOS KeywordIA SUPERNOVAE ; HUBBLE-BUBBLE ; DARK ENERGY
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000316989200014
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9909
Collection南极天文中心
Affiliation1.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
Recommended Citation
GB/T 7714
Yu, Bo. Impact of the local void on the cosmological parameters[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2013,0(3):4PP.
APA Yu, Bo.(2013).Impact of the local void on the cosmological parameters.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,0(3),4PP.
MLA Yu, Bo."Impact of the local void on the cosmological parameters".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS 0.3(2013):4PP.
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