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A two-point diagnostic for the HII galaxy Hubble diagram.
- Source :
-
Monthly Notices of the Royal Astronomical Society . Mar2018, Vol. 474 Issue 4, p4507-4513. 7p. 6 Graphs. - Publication Year :
- 2018
-
Abstract
- A previous analysis of starburst-dominated H ii galaxies and H ii regions has demonstrated a statistically significant preference for the Friedmann–Robertson–Walker cosmology with zero active mass, known as the Rh = ct universe, over Λcold dark matter (ΛCDM) 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 ΛCDM. 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 ΛCDM. But we also find that the reported errors in the H ii measurements may not be purely Gaussian, perhaps due to a partial contamination by non-Gaussian systematic effects. The use of H ii galaxies and H ii regions as standard candles may be improved even further with a better handling of the systematics in these sources. [ABSTRACT FROM AUTHOR]
- Subjects :
- *METAPHYSICAL cosmology
*LUMINOSITY
*HUBBLE constant
*GALACTIC redshift
*QUASARS
Subjects
Details
- Language :
- English
- ISSN :
- 00358711
- Volume :
- 474
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Publication Type :
- Academic Journal
- Accession number :
- 128123998
- Full Text :
- https://doi.org/10.1093/mnras/stx3109