4 papers
Investigating the Evolution of Amati Parameters with Redshift
Meghendra Singh, Darshan Singh, Kanhaiya Lal Pandey +2
Gamma Ray Bursts (GRB) are among the brightest objects in the Universe and hence can be observed up to a very high redshift. Properly calibrated empirical correlations between inte…
Cosmological Analysis using Panstarrs data: Hubble Constant and Direction Dependence
Rahul Kumar Thakur, Meghendra Singh, Shashikant Gupta +1
Hubble tension and the search for preferred direction are two crucial unresolved issues in modern cosmology. Different measurements of the Hubble constant provide significantly dif…
Measurement of Hubble Constant: Do Different Cosmological Probes Provide Different Values?
Rahul Kumar Thakur, Shashikant Gupta, Rahul Nigam +1
Different measurements of the Hubble constant () are not consistent and a tension between the CMB based methods and cosmic distance ladder based methods has been observed. M…
Cosmology with decaying tachyon matter
A. Das, Shashikant Gupta, Tarun Deep Saini +1
We investigate the case of a homogeneous tachyon field coupled to gravity in a spatially flat Friedman-Robertson-Walker spacetime. Assuming the field evolution to be exponentially…