New estimates for dark energy equation of state and Hubble constant
New independent measurements for dark energy equation state and Hubble parameter have been derived. Latest estimates by the Dark Energy Survey (DES) collaboration were submitted to the electronic preprint service arXiv on 7th of November.
New independent measurements for dark energy equation state and Hubble parameter have been derived. Latest estimates by the Dark Energy Survey (DES) collaboration were submitted to the electronic preprint service arXiv on 7th of November.
Dark Energy Survey (DES) collaboration has measured matter density of Ω_m = 0.331±0.038 for a flat ΛCDM universe. Combining constrains from their Type Ia supernovae measurements with ones from cosmic microwave background (CMB), DES collaboration reports w = −0.978 ± 0.059 for dark energy equation of state and Ω_m = 0.321±0.018 for matter density assuming flat wCDM model. Based on Type Ia supernovae, and baryon acoustic oscillation measurements, collaboration reports H0 = 67.77±1.30km/s/Mpc for Hubble constant. The newly reported value for Hubble constant is consistent with estimate derived from Planck measurement.
DARK's affiliate scientist, Professor Tamara Davis from (University of Queensland) is heavily involved in DES. Another former DARKer Dr. Per Andersen is involved in the collaboration as well.
Links to the articles:
- First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters
https://arxiv.org/abs/1811.02374 - Cosmological Constraints from Multiple Probes in the Dark Energy Survey
https://arxiv.org/abs/1811.02375 - First Cosmological Results using Type Ia Supernovae from the Dark Energy Survey: Measurement of the Hubble Constant
https://arxiv.org/abs/1811.02376 - First Cosmology Results Using Type Ia Supernovae From the Dark Energy Survey: Analysis, Systematic Uncertainties, and Validation
https://arxiv.org/abs/1811.02377 - First Cosmology Results Using Type Ia Supernovae From the Dark Energy Survey: Photometric Pipeline and Light Curve Data Release
https://arxiv.org/abs/1811.02378 - First Cosmology Results using Type Ia Supernova from the Dark Energy Survey: Simulations to Correct Supernova Distance Biases
https://arxiv.org/abs/1811.02379 - First Cosmology Results Using Type Ia Supernovae from the Dark Energy Survey: Effects of Chromatic Corrections to Supernova Photometry on Measurements of Cosmological Parameters
https://arxiv.org/abs/1811.02380 - Steve: A hierarchical Bayesian model for Supernova Cosmology
https://arxiv.org/abs/1811.02381