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25 papers · 1 filter
Constraining Thawing Dark Energy using Galaxy Cluster Number Counts
N. Chandrachani Devi, T. Roy Choudhury, Anjan A. Sen
We study the formation of galaxy clusters in the presence of thawing class of scalar field dark energy. We consider cases where the scalar field has canonical as well non canonical…
Nonstatic charged BTZ-like black holes in N+1 dimensions
Sushant G. Ghosh
We find an exact nonstatic charged BTZ-like solutions, in (+1)-dimensional Einstein gravity in the presence of negative cosmological constant and a nonlinear Maxwell field defin…
GCG Parametrization for Growth Function and Current Constraints
Gaveshna Gupta, Somasri Sen, Anjan A. Sen
We study the linear growth function for large scale structures in a cosmological scenario where Generalised Chaplygin Gas (GCG) serves as dark energy candidate. We parametrize…
5D Radiating black holes in Einstein-Yang-Mills-Gauss-Bonnet gravity
Sushant G. Ghosh
We derive nonstatic spherically symmetric solutions of a null fluid, in five dimension (5D), to Einstein-Yang-Mills (EYM) equations with the coupling of Gauss-Bonnet (GB) combinati…
Statistics of Bipolar Representation of CMB maps
Nidhi Joshi, Aditya Rotti, Tarun Souradeep
Gaussianity of temperature fluctuations in the Cosmic Microwave Background(CMB) implies that the statistical properties of the temperature field can be completely characterized by…
Cosmokinetics: A joint analysis of Standard Candles, Rulers and Cosmic Clocks
Remya Nair, Sanjay Jhingan, Deepak Jain
We study the accelerated expansion of the universe by using the kinematic approach. In this context, we parameterize the deceleration parameter, q(z), in a model independent way. A…