Hints of the $H_0-r_d$ tension in uncorrelated Baryon Acoustic Oscillations dataset

Abstract

Baryon Acoustic Oscillations (BAO) datasets use very precise measurements of the spatial distribution of large-scale structures as a distance ladder to help constrain cosmological parameters. In a recent article 1 , we combined 17 uncorrelated BAO measurements in the effective redshift range 0.106 ≤ z ≤ 2.36 with the Cosmic Chronometers data, the Pantheon Type Ia supernova and the Hubble Diagram of Gamma Ray Bursts and Quasars to obtain that the ΛCDM model fit infers for the Hubble constant: 69.85 ± 1.27km/sec/M pc and for the sound horizon distance: 146.1 ± 2.15M pc. Beyond the ΛCDM model we test Ω k CDM and wCDM and we get Ω k = −0.076 ± 0.012, w = −0.989 ± 0.049 accordingly. In this proceeding we present elaborate on our findings and we compare them to other recent results in the literature.

Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

“…However, as noted in Refs. [46,459,460], a dark energy model that merely changes the value of r d would not completely resolve the tension, since it will affect the inferred value of Ω m and transfer the tension to it. The sound horizon problem should be considered not only in the plane H 0 -r d , but it should be extended to the parameters triplet H 0 -r d -Ω m .…”

Neural network reconstruction of late-time cosmology and null tests

“…In this setting, CDM acts as a stabilizer for galactic structures [3,4], while on larger scales the cosmological constant takes on the role of dark energy and is responsible for the late-time accelerated expansion of the Universe [5,6]. Putting aside internal consistency issues [7], this description of the Universe is increasingly coming into tension with observations [8][9][10][11], while the prospect of detecting CDM seems to be ever more elusive [12].…”

Neural network reconstruction of H'(z) and its application in teleparallel gravity

“…However, ΛCDM has been plagued for decades by theoretical problems associated with the cosmological constant [9] as well as its UV completeness [10] as well as other issues [11] such as the prospect of direct observations of CDM becoming ever more elusive [12,13]. Most recently, the growing tension in measurements of the Hubble constant from different scales of observations has reached a potentially critical point [14][15][16][17][18][19][20].…”