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Impacts on cosmological constraints from degeneracies
Li H(李虹); Xia JQ(夏俊卿); Li, H; Xia, JQ
2012
Source PublicationJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Issue11Pages:39
AbstractIn this paper, we study the degeneracies among several cosmological parameters in detail and discuss their impacts on the determinations of these parameters from the current and future observations. By combining the latest data sets, including type-I a supernovae "Union2.1" compilation, WMAP seven-year data and the baryon acoustic oscillations from the SDSS Data Release Seven, we perform a global analysis to determine the cosmological parameters, such as the equation of state of dark energy w, the curvature of the universe Omega(k), the total neutrino mass Sigma m(v), and the parameters associated with the power spectrum of primordial fluctuations (n(s), alpha(s) and r). We pay particular attention on the degeneracies among these parameters and the influences on their constraints, by with or without including these degeneracies, respectively. We find that w and Omega(k) or Sigma m(v) are strongly correlated. Including the degeneracies will significantly weaken the constraints. Furthermore, we study the capabilities of future observations and find these degeneracies can be broken very well. Consequently, the constraints of cosmological parameters can be improved dramatically.
Keyworddark energy experiments cosmological parameters from CMBR
Subject AreaAstronomy & Astrophysics; Physics
DOI10.1088/1475-7516/2012/11/039
Indexed BySCI ; INSPIREHEP ; ADS
WOS IDWOS:000312263500022
ADS Bibcode2012JCAP...11..039L
ADS URLhttps://ui.adsabs.harvard.edu/abs/2012JCAP...11..039L
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2012JCAP...11..039L/citations
inspireid1189749
inspireURLhttps://inspirehep.net/literature/1189749
Citation statistics
Cited Times:10 [INSPIRE]
Cited Times:8 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/224396
Collection粒子天体物理中心
Recommended Citation
GB/T 7714
Li H,Xia JQ,Li, H,et al. Impacts on cosmological constraints from degeneracies[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2012(11):39.
APA 李虹,夏俊卿,Li, H,&Xia, JQ.(2012).Impacts on cosmological constraints from degeneracies.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(11),39.
MLA 李虹,et al."Impacts on cosmological constraints from degeneracies".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .11(2012):39.
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