252 citations · 446 across the 9 of their papers we have counts for
9 papers
Early- and Late-Time Modifications to CDM: Implications for the Hubble Tension
Rahul Dhyani, Purba Mukherjee, Arindam Chatterjee +1
We investigate an extension of CDM in which a fraction of cold Dark Matter (DM) decays into invisible dark radiation (DR) around the radiation-matter equality epoch, together wi…
Beyond CDM with a Logistic RG-like Flow of the Low Redshift Cosmic Evolution
Shibendu Gupta Choudhury, Anjan A Sen
Recent observations hint at possible late-time deviations from CDM. We introduce a minimal phenomenological framework in which the total equation of state follows…
Gravitational atoms in the braneworld scenario
Sunil Singh Bohra, Subhodeep Sarkar, Anjan Ananda Sen
In the Randall-Sundrum (RS) II braneworld scenario, general relativity (GR) is modified by adding an extra dimension such that it is indistinguishable from GR in the weak gravity l…
Supernovae constraints on dark energy and modified gravity models
M. C. Bento, O. Bertolami, N. M. C. Santos +1
We use the Type Ia Supernova gold sample to constrain the parameters of dark energy models namely the Cardassian, Dvali-Turner (DT) and generalized Chaplygin gas (GCG) models. In o…
Generalized Chaplygin Gas in a modified gravity approach
T. Barreiro, A. A. Sen
We study the generalized Chaplygin gas (GCG) scenario in a modified gravity approach. That is, we impose that our universe has a pure dust configuration, and allow for a modificati…
The Revival of the Unified Dark Energy-Dark Matter Model ?
M. C. Bento, O. Bertolami, A. A. Sen
We consider the generalized Chaplygin gas (GCG) proposal for unification of dark energy and dark matter and show that it admits an unique decomposition into dark energy and dark ma…