2016/09/01 by Eleonora Di Valentino, François R. Bouchet, Francois R. Bouchet · 27 citations
Physics and Astronomy · #Component (thermodynamics) #Cosmic background radiation #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark radiation #Galaxies: Formation, Evolution, Phenomena #Inflation (cosmology) #Planck #Planck energy #Planck mass #astro-ph.CO #hep-ph #hep-th
paper · pdf · doi:10.1088/1475-7516/2016/10/011
published in Journal of Cosmology and Astroparticle Physics 2016(10), 011 (Institute of Physics) · 5 pages, 4 figures
arxiv created 2016/09/01 · openalex created_date 2016/09/16 · openalex publication_date 2016/10/10 · arxiv updated 2016/10/19 · openalex updated_date 2026/08/06
Tram et al. 2016 recently pointed out in [1] that power-law inflation in presence of a dark radiation component may relieve the 3.3 σ tension which exists within standard ΛCDM between the determination of the local value of the Hubble constant by Riess et al. (2016) [2] and the value derived from CMB anisotropy data [3] by the Planck collaboration. In this comment, we simply point out that this interesting proposal does not help in solving the σ 8 tension between the Planck data and, e.g., the weak lensing measurements. Moreover, when the latest constraints on the reionization optical depth obtained from Planck HFI data [4] are included in the analysis, the H 0 tension reappears and this scenario looses appeal.