10 papers
Updated Constraints on Omnipotent Dark Energy: A Comprehensive Analysis with CMB and BAO Data
Enrico Specogna, Shahnawaz A. Adil, Emre Ozulker +4
In this work, we present updated observational constraints on the parameter space of the DMS20 dark energy model, a member of the omnipotent dark energy (ODE) class. Our analysis c…
The dynamics of background evolution and structure formation in phase space: a semi-cosmographic reconstruction
Pankaj Chavan, Tapomoy Guha Sarkar, Anjan A Sen
The Baryon Acoustic Oscillation (BAO) feature, imprinted in the transverse and radial clustering of dark matter tracers, enables the simultaneous measurement of the angular diamete…
Pressure Parametrization of Dark Energy: First and Second-Order Constraints with Latest Cosmological Data
Hanyu Cheng, Eleonora Di Valentino, Luis A. Escamilla +2
We explore an extension of the CDM model in which the pressure of the dark energy (DE) fluid evolves with the expansion of the Universe, expressed as a function of the scal…
Disentangling the growth rate of perturbations from the HI bias using only clustering data from galaxy surveys
Pankaj Chavan, Tapomoy Guha Sarkar, Anjan A Sen
This work serves two-fold purpose. Firstly, we provide an alternative to the traditional method of determining the growth rate of density perturbations . In usual practice, $…
A semi-cosmographic approach to study cosmological evolution in phase space
Pankaj Chavan, Tapomoy Guha Sarkar, Chandrachud B. V. Dash +1
The signature of Baryon Acoustic Oscillation in the clustering of dark-matter tracers allows us to measure independently. Treating these as conjugate variables, we…
Inferring dark energy properties from the scale factor parametrisation
Upala Mukhopadhyay, Sandeep Haridasu, Anjan A Sen +1
We propose and implement a novel test to assess deviations from well-established concordance CDM cosmology while inferring dark energy properties. In contrast to the commonly i…