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The H II galaxy Hubble diagram strongly favours R-h = ct over Lambda CDM
Wei, Jun-Jie; Wu, Xue-Feng; Melia, Fulvio
2016
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号463期号:2页码:0
摘要We continue to build support for the proposal to use H II galaxies (HIIGx) and giant extragalactic H II regions (GEHR) as standard candles to construct the Hubble diagram at redshifts beyond the current reach of Type Ia supernovae. Using a sample of 25 high-redshift HIIGx, 107 local HIIGx, and 24 GEHR, we confirm that the correlation between the emission -line luminosity and ionized -gas velocity dispersion is a viable luminosity indicator, and use it to test and compare the standard model Lambda CDM and the R-h = ct universe by optimizing the parameters in each cosmology using a maximization of the likelihood function. For the flat Lambda CDM model, the best fit is obtained with Omega(m) = 0.40(-0.09)(+0.09). However, statistical tools, such as the Akaike (AIC), Kullback (KIC) and Bayes (BIC) Information Criteria favour R-h = Ct over the standard model with a likelihood of approximate to 94.8-98.8 per cent versus only per cent. For wCDM (the version of ACDM with a dark -energy equation of state wde = Pde/Pde rather than was t WA = 1), a statistically acceptable fit is realized with Omega(m) = 0.221(-0.14)(+0.16) and wde = 0.511'0'21-5" which, however, are not fully consistent with their concordance values. In this case, wCDM has two more free parameters than R-h = Ct, and is penalized more heavily by these criteria. We find that R-h = Ct is strongly favoured over wCDM with a likelihood of approximate to 92.9-99.6 per cent versus only 0.4-7.1 per cent. The current HIIGx sample is already large enough for the BIC to rule out ACDM/wCDM in favour of R-h = Ct at a confidence level approaching 3 sigma.
文献类型期刊论文
条目标识符http://libir.pmo.ac.cn/handle/332002/17046
专题南极天文中心
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Wei, Jun-Jie,Wu, Xue-Feng,Melia, Fulvio. The H II galaxy Hubble diagram strongly favours R-h = ct over Lambda CDM[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,463(2):0.
APA Wei, Jun-Jie,Wu, Xue-Feng,&Melia, Fulvio.(2016).The H II galaxy Hubble diagram strongly favours R-h = ct over Lambda CDM.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,463(2),0.
MLA Wei, Jun-Jie,et al."The H II galaxy Hubble diagram strongly favours R-h = ct over Lambda CDM".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 463.2(2016):0.
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