The Constraint of H0from Galaxy clusters and Hubble parameter data
Abstract
Using comoving distance and angular diameter distance , we recalculate parameters describing kinematical state of the universe, still combining the kinematical model of universe but not relying on dynamical equations for gravity. Comoving distance comes from Hubble data H(z) and is more reliable. Angular diameter distance comes from SZE (Sunyaev-Zel dovich Effect) and X-ray data, and needs calibration. In low redshift case, we use expansion of relation between luminosity distance and redshift about redshift ; in high redshift case, we take variable substitution , and expand the relation between luminosity distance and redshift about variable in order to reduce computational errors. Finally we get the more precise value of Hubble parameter , corresponding to 0.4\% uncertainty in confidence region, also deceleration factor and acceleration rate , and their statistical values and probability graph. We compare the values of , , with those obtained from other observation data and model.
Cite
@article{arxiv.2103.03440,
title = {The Constraint of H0from Galaxy clusters and Hubble parameter data},
author = {Hai Huang and Long Huang},
journal= {arXiv preprint arXiv:2103.03440},
year = {2021}
}