Flat FRW Cosmologies with Adiabatic Matter Creation: Kinematic tests

TL;DR

This paper explores how adiabatic matter creation affects cosmological observations, deriving modified expressions for key measures like lookback time and luminosity distance to test and constrain these models.

Contribution

It provides exact formulas for observational relations in matter creation cosmologies, enabling comparison with standard FRW models to constrain parameters.

Findings

Modified expressions for cosmological observables are derived.

These expressions differ significantly from standard FRW models.

The results offer a new method to limit model parameters.

Abstract

Some observational consequences of a cosmological scenario driven by adiabatic matter creation are investigated. Exact expressions for the lookback time, age of the universe, luminosity distance, angular diameter, and galaxy number counts redshift relations are derived and their meaning discussed in detail. The expressions of the conventional FRW models are significantly modified and provide a powerful method to limit the parameters of the models.