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Utilizing the Updated Gamma-Ray Bursts and Type Ia Supernovae to Constrain the Cardassian Expansion Model and Dark Energy
Wei, Jun-Jie1,2; Ma, Qing-Bo1,2; Wu, Xue-Feng1,3,4
2015
Source PublicationADVANCES IN ASTRONOMY
Pages576093
AbstractWe update gamma-ray burst (GRB) luminosity relations among certain spectral and light-curve features with 139 GRBs. The distance modulus of 82 GRBs at z > 1.4 can be calibrated with the sample at z <= 1.4 by using the cubic spline interpolation method from the Union2.1 Type Ia supernovae (SNe Ia) set. We investigate the joint constraints on the Cardassian expansion model and dark energy with 580 Union2.1 SNe Ia sample (z < 1.4) and 82 calibrated GRBs' data (1.4 < z <= 8.2). In Lambda CDM, we find that adding 82 high-z GRBs to 580 SNe Ia significantly improves the constraint on Omega(m)-Omega(Lambda) plane. In the Cardassian expansion model, the best fit is Omega(m) = 0.24(-0.15)(+0.15) and n = 0.16(-0.52)(+0.30) (1 sigma), which is consistent with the Lambda CDM cosmology (n = 0) in the 1 sigma confidence region. We also discuss two dark energy models in which the equation of state omega(z) is parameterized as omega(z) = omega(0) and omega(z) = omega(0) + omega(1)z/(1+z), respectively. Based on our analysis, we see that our universe at higher redshift up to z = 8.2 is consistent with the concordance model within 1 sigma confidence level.
Subject Area天文和天体物理
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1155/2015/576093
WOS KeywordPEAK ENERGY ; COSMOLOGICAL IMPLICATIONS ; HUBBLE DIAGRAM ; LUMINOSITY ; UNIVERSE ; REDSHIFT ; DECELERATION ; PARAMETERS ; EVOLUTION ; MATTER
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000360717800001
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/14897
Collection南极天文中心
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Ctr Antarctic Astron, Nanjing 210008, Peoples R China
4.Nanjing Univ, Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Wei, Jun-Jie,Ma, Qing-Bo,Wu, Xue-Feng. Utilizing the Updated Gamma-Ray Bursts and Type Ia Supernovae to Constrain the Cardassian Expansion Model and Dark Energy[J]. ADVANCES IN ASTRONOMY,2015:576093.
APA Wei, Jun-Jie,Ma, Qing-Bo,&Wu, Xue-Feng.(2015).Utilizing the Updated Gamma-Ray Bursts and Type Ia Supernovae to Constrain the Cardassian Expansion Model and Dark Energy.ADVANCES IN ASTRONOMY,576093.
MLA Wei, Jun-Jie,et al."Utilizing the Updated Gamma-Ray Bursts and Type Ia Supernovae to Constrain the Cardassian Expansion Model and Dark Energy".ADVANCES IN ASTRONOMY (2015):576093.
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