The H II galaxy Hubble diagram strongly favours R-h = ct over Lambda CDM
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 GE...
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ndltd-arizona.edu-oai-arizona.openrepository.com-10150-6227402017-03-04T03:00:46Z The H II galaxy Hubble diagram strongly favours R-h = ct over Lambda CDM Wei, Jun-Jie Wu, Xue-Feng Melia, Fulvio Univ Arizona, Dept Phys Univ Arizona, Dept Astron H II regions galaxies: general cosmological parameters cosmology: observations cosmology: theory - distance scale 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. 2016-12-01 Article The H ii galaxy Hubble diagram strongly favours Rh = ct over ΛCDM 2016, 463 (2):1144 Monthly Notices of the Royal Astronomical Society 0035-8711 1365-2966 10.1093/mnras/stw2057 http://hdl.handle.net/10150/622740 http://arizona.openrepository.com/arizona/handle/10150/622740 Monthly Notices of the Royal Astronomical Society en https://academic.oup.com/2016-08-17 00:00:00/article-lookup/doi/10.1093/mnras/stw2057 © 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society OXFORD UNIV PRESS |
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en |
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H II regions galaxies: general cosmological parameters cosmology: observations cosmology: theory - distance scale |
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H II regions galaxies: general cosmological parameters cosmology: observations cosmology: theory - distance scale Wei, Jun-Jie Wu, Xue-Feng Melia, Fulvio The H II galaxy Hubble diagram strongly favours R-h = ct over Lambda CDM |
description |
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. |
author2 |
Univ Arizona, Dept Phys |
author_facet |
Univ Arizona, Dept Phys Wei, Jun-Jie Wu, Xue-Feng Melia, Fulvio |
author |
Wei, Jun-Jie Wu, Xue-Feng Melia, Fulvio |
author_sort |
Wei, Jun-Jie |
title |
The H II galaxy Hubble diagram strongly favours R-h = ct over Lambda CDM |
title_short |
The H II galaxy Hubble diagram strongly favours R-h = ct over Lambda CDM |
title_full |
The H II galaxy Hubble diagram strongly favours R-h = ct over Lambda CDM |
title_fullStr |
The H II galaxy Hubble diagram strongly favours R-h = ct over Lambda CDM |
title_full_unstemmed |
The H II galaxy Hubble diagram strongly favours R-h = ct over Lambda CDM |
title_sort |
h ii galaxy hubble diagram strongly favours r-h = ct over lambda cdm |
publisher |
OXFORD UNIV PRESS |
publishDate |
2016 |
url |
http://hdl.handle.net/10150/622740 http://arizona.openrepository.com/arizona/handle/10150/622740 |
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