Cosmological Constraints using the newest VLT-KMOS HII Galaxies and the full Planck CMB spectrum

Abstract

We present novel cosmological constraints based on a joint analysis of our HII galaxies (HIIG) Hubble relation with the full Planck Cosmic Microwave Background anisotropy spectrum and the Baryon Acoustic Oscillations (BAO) probes. The HII galaxies span a large redshift range $(0.088\le z\le 2.5)$, reaching significantly higher redshifts than available SNIa and hence they probe the cosmic expansion at earlier times. Our independent constraints compare well with those based on the Pantheon compilation of SNIa data, which we also analyse. We find our results to be in agreement with the conformal $\Lambda$CDM model within 1$\sigma$. We also use our HIIG data to examine the behaviour of the dark energy equation of state parameter under the CPL parameterisation, $w=w_0+w_a\frac{z}{1+z}$, and find consistent results with those based on SNIa, although the degeneracy in the parameter space as well as the individual parameter uncertainties, when marginalizing one over the other, are quite large.

7 pages, 3 figures

References in corpus (11)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• In the Realm of the Hubble tension $-$ a Review of Solutions
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
• Improved Dark Energy Constraints from ~100 New CfA Supernova Type Ia Light Curves
• The $L-\sigma$ relation for massive bursts of star formation
• An independent determination of the local Hubble constant
• Constraining the Dark Energy Equation of State with HII Galaxies
• Independent Cosmological Constraints from high-z HII Galaxies
• Independent cosmological constraints from high-z HII galaxies: new results from VLT-KMOS data
• Constraining the Parameter Space of the Dark Energy Equation of State Using Alternative Cosmic Tracers

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• Constraining the swiss-cheese IR-fixed point cosmology with cosmic expansion
• The PAU Survey: Classifying low-z SEDs using Machine Learning clustering