中国物理B ›› 2011, Vol. 20 ›› Issue (7): 79801-079801.doi: 10.1088/1674-1056/20/7/079801

• GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS • 上一篇    

Constraints on the unified model of dark matter and dark energy

吕剑波1, 吴亚波1, 徐立昕2, 王钰婷2   

  1. (1)Department of Physics, Liaoning Normal University, Dalian 116029, China; (2)School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
  • 收稿日期:2010-12-04 修回日期:2011-02-22 出版日期:2011-07-15 发布日期:2011-07-15

Constraints on the unified model of dark matter and dark energy

Lü Jian-Bo(吕剑波)a), Wu Ya-Bo(吴亚波)a), Xu Li-Xin(徐立昕)b), and Wang Yu-Ting(王钰婷)b)   

  1. a Department of Physics, Liaoning Normal University, Dalian 116029, China; b School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
  • Received:2010-12-04 Revised:2011-02-22 Online:2011-07-15 Published:2011-07-15

摘要: 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.

Abstract: 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.

Key words: generalized Chaplygin gas, unification of dark matter and dark energy

中图分类号:  (Cosmology)

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