AffiliationUniv Arizona, Dept Phys
Univ Arizona, Dept Phys, Program Appl Math
Univ Arizona, Dept Astron
large-scale structure of Universe
MetadataShow full item record
PublisherOXFORD UNIV PRESS
CitationA two-point diagnostic for the H ii galaxy Hubble diagram 2018, 474 (4):4507 Monthly Notices of the Royal Astronomical Society
Rights© 2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
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AbstractA previous analysis of starburst-dominated HII galaxies and HII regions has demonstrated a statistically significant preference for the Friedmann-Robertson-Walker cosmology with zero active mass, known as the R-h = c(t) universe, over Lambda cold dark matter (Lambda CDM) and its related dark-matter parametrizations. In this paper, we employ a two-point diagnostic with these data to present a complementary statistical comparison of Rh = ct with Planck Lambda CDM. Our two-point diagnostic compares, in a pairwise fashion, the difference between the distance modulus measured at two redshifts with that predicted by each cosmology. Our results support the conclusion drawn by a previous comparative analysis demonstrating that Rh = ct is statistically preferred over Planck Lambda CDM. But we also find that the reported errors in the HII measurements may not be purely Gaussian, perhaps due to a partial contamination by non-Gaussian systematic effects. The use of HII galaxies and HII regions as standard candles may be improved even further with a better handling of the systematics in these sources.
VersionFinal published version
SponsorsChinese Academy of Sciences [2012T1J0011]; Chinese State Administration of Foreign Experts Affairs [GDJ20120491013]