I. K. Rozgacheva, A. A. Borisov, A. A. Agapov. Observational constrains on two cosmological models

Natural Sciences / Astronomy / Astrophysics

Submitted on: Feb 18, 2015, 06:09:54

Description: Recently the model-independent approach to calculating a plot of scale factor a versus lookback time t has been developed by Ringermacher & Mead. In the present paper we compare the dependence obtained in their work with predicted ones given by cosmological model with scalar meson field and by two-component (warm massive fermions + cosmological constant) cosmological model. For these models we fit cosmological parameters and estimate corresponding confidence intervals. It was found that there exist a broad region in the parameter space of two-component model satisfying the observed data. We also estimate the transition redshift of the universe in the noisy a(t)-data using anisotropic Gaussian filter on a - t plane. The estimated value of $z_t=0.72pm0.05$ imposes stronger restrictions on the models' parameters.

The Library of Congress (USA) reference page : http://lccn.loc.gov/cn2013300046.

To read the article posted on Intellectual Archive web site please click the link below.

Observational constrains on two cosmological models.pdf

© Shiny World Corp., 2011-2024. All rights reserved. To reach us please send an e-mail to support@IntellectualArchive.com