Age Estimates of Universe: from Globular Clusters to Cosmological Models and Probes

Abstract

We performed the photometric analysis of M2 and M92 globular clusters in g and r bands of SLOAN photometric system. We transformed these g and r bands into BV bands of Johnson-Cousins photometric system and built the color magnitude diagram (CMD). We estimated the age, and metallicity of both the clusters, by fitting Padova isochrones of different age and metallicities onto the CMD. We studied Einstein and de Sitter model, bench mark model, the cosmological parameters by WMAP and Planck surveys. Finally, we compared estimated age of globular clusters to the ages from the cosmological models and cosmological parameters values of WMAP and Planck surveys.

arXiv comment13 pages, 5 figures and five tables. submitted to Journal of GeoSpace Science (JOGGS)

References in corpus (2)

• The Seventh Data Release of the Sloan Digital Sky Survey
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Planets and Celestial Calibration Sources

Cited by in corpus (2)

• Accelerated expansion of the universe and chasing photons from the CMB to study the late time integrated Sachs-Wolfe effect over different redshift ranges
• Number counts, confusion, mapping issues and sky coverage analysis for radio continuum surveys through EMU Early Science, EMU-ASKAP, and WODAN especially for cosmology science goals