86 citations · 215 across the 16 of their papers we have counts for
17 papers
A novel phenomenological parametrization of dynamical dark energy via matter-gravity coupling
Hrishikesh Chakrabarty, Daniele Malafarina
We develop a new parametrization for generic departures from the CDM model based on the Markov-Mukhanov action with non-minimal matter-gravity coupling. In this approach the cos…
Can UV meet IR in the Swiss cheese?
Madina Abilmazhinova, Diana Kulubayeva, Hrishikesh Chakrabarty +1
We consider the embedding of regular black holes in an expanding universe and study how the ultraviolet modifications to the Schwarzschild geometry that regularize the black hole s…
A unified model of dark energy and inflation from the Markov-Mukhanov action
Hrishikesh Chakrabarty, Daniele Malafarina
We propose a unified model of dark energy and inflation through the Markov-Mukhanov modification of the Einstein-Hilbert action, where the matter sector is coupled to gravity via a…
Observational properties of regular black holes in Asymptotic Safety
Abdybek Urmanov, Hrishikesh Chakrabarty, Daniele Malafarina
We consider the observational properties of a spherically symmetric, static regular black hole within the framework of asymptotic safety (AS) as proposed by Bonanno et al. The metr…
How to obtain slow roll inflation driven by non-linear electrodynamics
Daniele Malafarina, Hrishikesh Chakrabarty, Ilia Musco
We establish for the first time the conditions that must be imposed on the action for a magnetic universe in a theory of non-linear electrodynamics in order to have an asymptotical…
Running gravitational constant induced dark energy as a solution to tension
Tilek Zhumabek, Azamat Mukhamediya, Hrishikesh Chakrabarty +1
We consider a modified gravity model with a running gravitational constant coupled to a varying dark energy fluid and test its imprint on the growth of structure in the universe. U…
Intermediate mass ratio inspirals in dark matter halos
Darkhan Shadykul, Hrishikesh Chakrabarty, Daniele Malafarina
We study eccentric equatorial orbits of a stellar-mass black hole around an intermediate-mass slowly rotating Kerr black hole in the presence of gravitational radiation and a dark…
Gravitational lensing of neutrinos in the Rezzolla-Zhidenko spacetime
Mirzabek Alloqulov, Hrishikesh Chakrabarty, Daniele Malafarina +2
We consider gravitational lensing of neutrinos in the Rezzolla-Zhidenko spacetime in the weak-field limit with plane-wave approximation. We apply the analysis to an hypothetical sy…
Observational properties of Coherent Quantum Black Holes
Abdybek Urmanov, Hrishikesh Chakrabarty, Daniele Malafarina
We consider null and time-like geodesics around a spherically symmetric, non-rotating Coherent Quantum Black Hole (CQBH). The classical limit of the geometry of CQBH departs from t…
An emergent cosmological model from running Newton constant
Aknur Zholdasbek, Hrishikesh Chakrabarty, Daniele Malafarina +1
We propose an emergent cosmological model rooted in the Asymptotically Safe antiscreening behavior of the Newton constant at Planckian energies. Distinguishing itself from prior ap…
Effects of gravitational lensing by Kaluza-Klein black holes on neutrino oscillations
Hrishikesh Chakrabarty, Auttakit Chatrabhuti, Daniele Malafarina +2
We study gravitational lensing of neutrinos in a Kaluza-Klein black hole spacetime and compare the oscillation probabilities of neutrinos with the case of lensing by black holes in…
Constraining deviations from spherical symmetry using -metric
Hrishikesh Chakrabarty, Yong Tang
The -spacetime metric is a static and axially symmetric vacuum solution of the Einstein equation. This spacetime represents a naked singularity and it has an extra parameter $…
Effects of gravitational lensing on neutrino oscillation in -spacetime
Hrishikesh Chakrabarty, Debasish Borah, Ahmadjon Abdujabbarov +2
We study the effects of gravitational lensing on neutrino oscillations in the -spacetime which describes a static, axially-symmetric and asymptotically flat solution of the Eins…
Rotating regular black holes in conformal massive gravity
Kimet Jusufi, Mubasher Jamil, Hrishikesh Chakrabarty +3
In this paper, we use a suitable conformal rescaling to construct static and rotating regular black holes in conformal massive gravity. The new metric is characterized by the mass…
A toy model for a baby universe inside a black hole
Hrishikesh Chakrabarty, Ahmadjon Abdujabbarov, Daniele Malafarina +1
We present a dynamical toy model for an expanding universe inside a black hole. The model is built by matching a spherically symmetric collapsing matter cloud to an expanding Fried…
Scalar perturbations and quasi-normal modes of a non-linear magnetic-charged black hole surrounded by quintessence
Hrishikesh Chakrabarty, Ahmadjon A. Abdujabbarov, Cosimo Bambi
We study scalar perturbations and quasinormal modes of a nonlinear magnetic charged black hole surrounded by quintessence. Time evolution of scalar perturbations is studied for dif…
Unattainable extended spacetime regions in conformal gravity
Hrishikesh Chakrabarty, Carlos A. Benavides-Gallego, Cosimo Bambi +1
The Janis-Newman-Winicour metric is a solution of Einstein's gravity minimally coupled to a real massless scalar field. The -metric is instead a vacuum solution of Einstein's gr…