Cosmokinetics: A joint analysis of Standard Candles, Rulers and Cosmic Clocks

TL;DR

This paper investigates the universe's accelerated expansion using a model-independent kinematic approach by analyzing various cosmological data sets to reconstruct the deceleration parameter q(z).

Contribution

It introduces a joint analysis method combining multiple cosmological observations to reconstruct q(z) without assuming a specific cosmological model.

Findings

Supports the accelerated expansion of the universe

Reconstructs q(z) using diverse data sets

Demonstrates the effectiveness of a model-independent approach

Abstract

We study the accelerated expansion of the universe by using the kinematic approach. In this context, we parameterize the deceleration parameter, q(z), in a model independent way. Assuming three simple parameterizations we reconstruct q(z). We do the joint analysis with combination of latest cosmological data consisting of standard candles (Supernovae Union2 sample), standard ruler (CMB/BAO), cosmic clocks (age of passively evolving galaxies) and Hubble (H(z)) data. Our results support the accelerated expansion of the universe.