`Pure' Supernovae and Accelerated Expansion of the Universe

TL;DR

This paper identifies a special class of type Ia supernovae unaffected by certain absorption and evolution factors, confirming the universe's accelerated expansion independently of these effects.

Contribution

It introduces a class of supernovae that are free from typical absorption and evolution biases, providing a more reliable measure of cosmic acceleration.

Findings

Confirmed accelerated expansion of the universe

Supernovae class unaffected by gray absorption

Independence from chemical evolution effects

Abstract

A special class of type Ia supernovae that is not subject to ordinary and additional intragalactic gray absorption and chemical evolution has been identified. Analysis of the Hubble diagrams constructed for these supernovae confirms the accelerated expansion of the Universe irrespective of the chemical evolution and possible gray absorption in galaxies.