129 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Jadavpur UniversityIN12 papers
- Saha Institute of Nuclear PhysicsIN11 papers
- St Xavier’s CollegeIN7 papers
- Bose InstituteIN5 papers
- St. Xavier's College (Autonomous)5 papers
- The University of OsakaJP4 papers
- Government of West BengalIN3 papers
- Scottish Church CollegeIN3 papers
- F.D. Ovcharenko Institute of Biocolloidal ChemistryUA2 papers
- Gopal Nagar High SchoolIN2 papers
- Indian Institute of Science Education and Research KolkataIN2 papers
- Inter-University Centre for Astronomy and AstrophysicsIN2 papers
19 papers · 1 filter
Dynamical conditions and causal transport of dissipative spherical collapse in gravity
Sarbari Guha, Uttaran Ghosh
In this paper, we have investigated the non-adiabatic spherical gravitational collapse in the framework of the theory of gravity with a locally anisotropic fluid that unde…
An investigation on gravitational entropy of cosmological models
Samarjit Chakraborty, Sarbari Guha, Rituparno Goswami
In this paper, we investigate the entropy of the free gravitational field for a given epoch for some well-known isotropic and anisotropic cosmologies. We use the definition of grav…
On the gravitational entropy of accelerating black holes
Sarbari Guha, Samarjit Chakraborty
In this paper we have examined the validity of a proposed definition of gravitational entropy in the context of accelerating black hole solutions of the Einstein field equations, w…
Evolution of FRW universe in variable modified Chaplygin gas model
Samarjit Chakraborty, Sarbari Guha, D. Panigrahi
In this paper we study the evolution of the FRW universe filled with variable modified Chaplygin gas (VMCG). We begin with a thermodynamical treatment of VMCG described by the equa…
Five-dimensional warped product space-time with time-dependent warping and a scalar field in the bulk
Sarbari Guha, Pinaki Bhattacharya
We have considered gravity in a five-dimensional warped product space-time, with a time-dependent warp factor and a time-dependent extra dimension. The five-dimensional field equat…
Strong Lensing of a Regular Black Hole with an Electrodynamics Source
Tuhina Manna, Farook Rahaman, Sabiruddin Molla +2
In this paper we have investigated the gravitational lensing phenomenon in the strong field regime for a regular, charged, static, non-linear black hole having a electrodynamics so…
A Study of the Time Evolution of Brans-Dicke Parameter and its Role in Cosmic Expansion
Sudipto Roy, Soumyadip Chowdhury
The dependence of Brans-Dicke (BD) parameter upon the scalar field, for different cosmological era of the expanding universe, has been explored. The time dependence of the scalar f…
A new class of relativistic model of compact stars of embedding class I
Piyali Bhar, Ksh. Newton Singh, Tuhina Manna
In the present paper we have constructed a new relativistic anisotropic compact star model having a spherically symmetric metric of embedding class one. Here we have assumed an arb…
Dark energy stars: Stable configurations
Piyali Bhar, Tuhina Manna, Farook Rahaman +1
In present paper a spherically symmetric stellar configuration has been analyzed by assuming the matter distribution of the stellar configuration is anisotropic in nature and compa…
Time Evolution of the Matter Content of the Expanding Universe in the Framework of Brans-Dicke Gravity
Sudipto Roy
A cosmological model has been constructed in the framework of Brans-Dicke (BD) gravity, based on an inter-conversion between matter and dark energy, for a spatially flat universe i…
Modified Bekenstein-Hawking system in gravity
Jibitesh Dutta, Saugata Mitra, Binod Chetry
The present work deals with four alternative formulation of Bekenstein system on event horizon in gravity. While thermodynamical laws holds in universe bounded by apparent h…
A Study on the Expanding Universe Based on a Model of the Time Variation of its Matter Content in the Framework of Brans-Dicke Theory
Sudipto Roy, Dibyajyoti Laha, Argho Aranya Sangma +1
A theoretical model of cosmic expansion has been formulated on an assumption of inter-conversion of matter and dark energy, in the framework of Brans-Dicke theory. An empirical sca…
Modelling of anisotropic compact stars of emebedding class one
Piyali Bhar, S. K. Maurya, Y. K. Gupta +1
In the present article, we have constructed static anisotropic compact star models of Einstein field equations for the spherical symmetric metric of embedding class one. By assumin…
A study on the dependence of the dimensionless Brans-Dicke parameter on the scalar field and their time dependence
Sudipto Roy, Surajit Chattopadhyay, Antonio Pasqua
The present paper reports a study on the dimensionless parameter in Brans-Dicke theory. Based on a particular choice of scale factor , we have investigated the signature fli…
Dissipative Cylindrical Collapse of Charged Anisotropic Fluid
Sarbari Guha, Ranajoy Banerji
We have studied the dynamics of a cylindrical column of anisotropic, charged fluid which is experiencing dissipation in the form of heat flow, free-streaming radiation, and shearin…
Spherically symmetric scalar field collapse
Koyel Ganguly, Narayan Banerjee
It is shown that a scalar field, minimally coupled to gravity may have collapsing modes even when the energy condition is violated, that is, for . This result may be usef…
Particle Motion and Perturbed Dynamical System in Warped Product Spacetimes
Pinaki Bhattacharya, Sarbari Guha
In this paper we have used the dynamical systems analysis to study the dynamics of a five-dimensional universe in the form of a warped product spacetime with a spacelike dynamic ex…
Particle motion in the field of a five-dimensional charged black hole
Sarbari Guha, Pinaki Bhattacharya, Subenoy Chakraborty
In this paper, we have investigated the geodesics of neutral particles near a five-dimensional charged black hole using a comparative approach. The effective potential method is us…
Brane Cosmology and Motion of Test Particles in Five-Dimensional Warped Product Spacetimes
Sarbari Guha, Subenoy Chakraborty
In the braneworld scenario ordinary standard model matter and on-gravitational fields are confined by some trapping mechanism to the 4-dimensional universe constituting the D3-bran…