ESTIMATING COSMOLOGICAL MODEL PARAMETERS USING TYPE IA SUPERNOVAE DATA
Mriganko Bastav Chakravertty
Assistant Professor, Department of Physics, Pandit Deendayal Upadhyaya Adarsha Mahavidyalaya,
(Government Model Degree College), Dalgaon, Assam, India.
Abstract: In this work, the author uses 13 magnitude-redshift data of a Type Ia supernovae, from Ratra et al. (2011) [1]. to estimate cosmological model parameters of the λCDM model. Author considers a spatially flat two-component model universe to estimate the matter density Ωm0 and the cosmological constant Ωλ0, of the Friedmann equations, applying the maximum likelihood test. Using simple statistical methods constraint contours are plotted around the best fit value in the Ωm0-Ωλ0 plane. The mean values of the Hubble parameter for all the 13 redshifts are computed using Monte Carlo simulation. The results obtained are in good agreement with the observed values.
Keywords: Cosmological model parameter, Hubble Constant, Redshift, Spacetime