Ho'oleilana: An Individual Baryon Acoustic Oscillation?

TL;DR

This paper reports the discovery of a strong, individual baryon acoustic oscillation structure named Ho'oleilana at z=0.068, with implications for understanding cosmic large-scale structure and estimating the Hubble constant.

Contribution

It presents the first evidence of a distinct BAO structure, Ho'oleilana, and discusses its properties and significance in cosmology.

Findings

Ho'oleilana has a radius of approximately 155/h_{75} Mpc.

It encompasses the Bootes supercluster and includes major cosmic structures.

The analysis suggests a Hubble constant of about 77 km/s/Mpc.

Abstract

Theory of the physics of the early hot universe leads to a prediction of baryon acoustic oscillations that has received confirmation from the pair-wise separations of galaxies in samples of hundreds of thousands of objects. Evidence is presented here for the discovery of a remarkably strong individual contribution to the baryon acoustic oscillation (BAO) signal at z=0.068, an entity that is given the name Ho'oleilana. The radius of the 3D structure is 155/h_{75} Mpc. At its core is the Bootes supercluster. The Sloan Great Wall, CfA Great Wall, and Hercules complex all lie within the BAO shell. The interpretation of Ho'oleilana as a BAO structure with our preferred analysis implies a value of the Hubble constant of 76.9+8.2-4.8 km/s/Mpc.