The New Wedge-Shaped Hubble Diagram of 398 SCP Supernovae According to the Expansion Center Model

TL;DR

This paper constructs a new wedge-shaped Hubble diagram using 398 supernovae data based on the expansion center model, revealing anisotropy in the Hubble flow and proposing a correlation between supernova brightness and redshift.

Contribution

It introduces a novel wedge-shaped Hubble diagram derived from the ECM, incorporating a correlation between supernova brightness and redshift, and highlights anisotropic features in cosmic expansion.

Findings

Wedge-shaped Hubble diagram confirmed with 398 supernovae

ECM-based correlation between supernova brightness and redshift

Evidence of dipole anisotropy in the Hubble flow

Abstract

Following the successful dipole test on 53 SCP SNe Ia presented at SAIt2004 in Milan, this 9th contribution to the ECM series beginning in 1999 in Naples (43th SAIt meeting: "Revolutions in Astronomy") deals with the construction of the new wedge-shaped Hubble diagram obtained with 398 supernovae of the SCP Union Compilation (Kowalski et al. 2008) by applying a calculated correlation between SNe Ia absolute blue magnitude MB and central redshift z0, according to the expansion center model. The ECM distance D of the Hubble diagram (cz versus D) is computed as the ratio between the luminosity distance DL and 1 + z. Mathematically D results to be a power series of the light-space r run inside the expanding cosmic medium or Hubble flow; thus its expression is independent of the corresponding z. In addition one can have D = D(z, h) from the ECM Hubble law by using the h convention with an anisotropic HX. It is proposed to the meeting that the wedge-shape of this new Hubble diagram be confirmed independently as mainly due to the ECM dipole anisotropy of the Hubble ratio cz/D.