Probing the Matter Density at High Redshift

Meghendra Singh; Shashikant Gupta; Ashwini Pandey  and Satendra Sharma

doi:10.17485/ijst/2017/v10i30/115493

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Probing the Matter Density at High Redshift

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Indian Journal of Science and Technology

DOI: 10.17485/ijst/2017/v10i30/115493

Year: 2017, Volume: 10, Issue: 30, Pages: 1-3

Original Article

Probing the Matter Density at High Redshift

Meghendra Singh^1*, Shashikant Gupta² , Ashwini Pandey³ and Satendra Sharma⁴

¹Dr.A.P.J.Abdul Kalam Technical University, Lucknow – 226021, Uttar Pradesh, India; [email protected] ²GD Goenka University Gurgaon – 122103, Haryana, India; [email protected] ³Amity University Haryana, Gurgaon – 122413, Haryana, India 4 Yobe State University, Gujba Road, PMB 1144, Damaturu, Yobe State, Nigeria

*Author for the correspondence:
Meghendra Singh
Dr.A.P.J.Abdul Kalam Technical University, Lucknow – 226021, Uttar Pradesh, India; [email protected]

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

Objectives: We investigate the constraints on cosmological parameters from the observed set of 79 calibrated Gamma Ray Bursts (GRBs). Methods/Statistical Analysis: To measure cosmological parameters (ΩM,H0 ) for ΛCDM cosmology, we use Maximum-likelihood method. We marginalize over H0 using Bayesian approach as well. Finding: Our results gives the value of matter density is (ΩM = 0.18) and expansion rate (H0 = 82.5) for the set of GRBs. Application/Improvements: Method used in this paper helps us to estimate the cosmological parameter. Using this method we have obtain sensible answers in a straightforward manner.

Keywords: Bayesian, Bursts—Cosmology, Gamma Rays, Maximum-Likelihood, Observations—Cosmology