Constraints on the unified model of dark matter and dark energy

Using recently observed data： the Constitution dataset of type supernovae Ia （SNIa）, the observational Hubble data （OHD）, the measurement results of baryon acoustic oscillation （BAO） from the Sloan Digital Sky Survey （SDSS） and the Two Degree Field Galaxy Redshift Survey （2dFGRS）, and the current co...

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Published inChinese physics B Vol. 20; no. 7; pp. 504 - 510
Main Author 吕剑波 吴亚波 徐立昕 王钰婷
Format Journal Article
LanguageEnglish
Published 01.07.2011
Subjects
Anisotropy
Chaplygin gas
Cosmic microwave background
Dark energy
Dark matter
Density
Monte Carlo methods
Oscillations
SNIA
威尔金森微波各向异性探测器
宇宙微波背景
暗物质
暗能量
统一模型
观测数据
马尔可夫链蒙特卡罗方法
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ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/20/7/079801

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Summary:Using recently observed data： the Constitution dataset of type supernovae Ia （SNIa）, the observational Hubble data （OHD）, the measurement results of baryon acoustic oscillation （BAO） from the Sloan Digital Sky Survey （SDSS） and the Two Degree Field Galaxy Redshift Survey （2dFGRS）, and the current cosmic microwave background （CMB） data from the five-year Wilkinson Microwave Anisotropy Probe （WMAP）, we apply the Markov Chain Monte Carlo method to investigate the observational constraints on the generalized Chaplygin gas （GCG） model as the unification of dark matter and dark energy. For this unified model, the constraints on GCG mixture are discussed by considering the different expressions of current matter density or considering constraints as being independent of the matter quantity Ωm.
Bibliography:Using recently observed data： the Constitution dataset of type supernovae Ia （SNIa）, the observational Hubble data （OHD）, the measurement results of baryon acoustic oscillation （BAO） from the Sloan Digital Sky Survey （SDSS） and the Two Degree Field Galaxy Redshift Survey （2dFGRS）, and the current cosmic microwave background （CMB） data from the five-year Wilkinson Microwave Anisotropy Probe （WMAP）, we apply the Markov Chain Monte Carlo method to investigate the observational constraints on the generalized Chaplygin gas （GCG） model as the unification of dark matter and dark energy. For this unified model, the constraints on GCG mixture are discussed by considering the different expressions of current matter density or considering constraints as being independent of the matter quantity Ωm.
Lu Jian-Bo Wu Ya-Bo Xu Li-Xin Wang Yu-Ting a） Department of Physics, Liaoning Normal University, Dalian 116029, China b） School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
generalized Chaplygin gas, unification of dark matter and dark energy
11-5639/O4
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/20/7/079801