38 citations · 296 across the 18 of their papers we have counts for
18 papers
Anisotropic compact star with a linear pressure-density relationship
Shyam Das, Bikram Keshari Parida, Koushik Chakraborty +1
We present a model of compact astrophysical object under General Theory of Relativity using the anisotropic extension of Tolman IV solution. The anisotropy function, derived from t…
Anisotropic generalization of Buchdahl bound for specific stellar models
Ranjan Sharma, Arpita Ghosh, Soumik Bhattacharya +1
Anisotropy is one factor that appears to be significantly important in the studies of relativistic compact stars. In this paper, we make a generalization of the Buchdahl limit by i…
Anisotropic compact stars: Constraining model parameters to account for physical features of tidal Love numbers
Shyam Das, Saibal Ray, Maxim Khlopov +2
In this paper, we develop a new class of models for a compact star with anisotropic stresses inside the matter distribution. By assuming a linear equation of state for the anisotro…
An analytical anisotropic compact stellar model of embedding class I
Lipi Baskey, Shyam Das, Farook Rahaman
A class of solutions of Einstein field equations satisfying Karmarkar embedding condition is presented which could describe static, spherical fluid configurations, and could serve…
Gravitational collapse of anisotropic stars
Shyam Das, Bikash Chandra Paul, Ranjan Sharma
We study the gravitational collapse of a spherically symmetric anisotropic relativistic star within Einstein theory of gravity making use of one of our recently developed collapsin…
Tidal love number of a static spherically symmetric anisotropic compact star
Shyam Das, Bikram Keshari Parida, Ranjan Sharma
Tidal deformability of a coalescing neutron star subjected to an external tidal field plays an important role in our probe for the structure and properties of compact stars. In par…
A study on the effect of anisotropy under Finch-Skea geometry
Shyam Das, Koushik Chakraborty, Lipi Baskey +1
The popularity of the Finch-Skea ansatz to describe relativistic stellar model have encouraged us to study the analytic solutions of the Einstein field equation. We have presented…
Compact stellar model in Tolman space-time in presence of pressure anisotropy
Piyali Bhar, Shyam Das, Bikram Keshari Parida
In this paper, we develop a new relativistic compact stellar model for a spherically symmetric anisotropic matter distribution. The model has been obtained through generating a new…
A new model for dark matter fluid sphere
Shyam Das, Nayan Sarkar, Monimala Mondal +1
We develop a new model for a spherically symmetric dark matter fluid sphere containing two regions: {\bf (i)} Isotropic inner region with constant density and {\bf (ii)} Anisotropi…
Revisiting Vaidya-Tikekar stellar model in the linear regime
Ranjan Sharma, Shyam Das, Megan Govender +1
We obtain a new class of solutions by revisiting the Vaidya-Tikekar stellar model in the linear regime. Making use of the Vaidya and Tikekar metric ansatz [J. Astrophys. Astron. {\…
An electromagnetic extension of the Schwarzschild interior solution and the corresponding Buchdahl limit
Ranjan Sharma, Naresh Dadhich, Shyam Das +1
We wish to construct a model for charged star as a generalization of the uniform density Schwarzschild interior solution. We employ the Vaidya and Tikekar ansatz [{\it Astrophys. A…
Anisotropic generalization of well-known solutions describing relativistic self-gravitating fluid systems: An algorithm
S. Thirukkanesh, F. C. Ragel, Ranjan Sharma +1
We present an algorithm to generalize a plethora of well-known solutions to Einstein field equations describing spherically symmetric relativistic fluid spheres by relaxing the pre…
Anisotropic extension of Finch and Skea stellar model
Ranjan Sharma, Shyam Das, S. Thirukkanesh
In this paper, the spacetime geometry of Finch and Skea [Class. Quantum Grav., 6 (1989) 467] has been utilized to obtain closed-form solutions for a spherically symmetric anisotrop…
Charged compact stellar model in Finch-Skea spacetime
B. S. Ratanpal, D. M. Pandya, R. Sharma +1
In this paper a compact charged stellar model in the Finch and Skea background spacetime [{\it Class. Quantum Gravity} {\bf6}, 467 (1989)] is presented. The model has been develope…
Gravitational collapse of a circularly symmetric star
Ranjan Sharma, Shyam Das, Farook Rahaman +1
We investigate the collapse of a circularly symmetric star with outgoing radiation in ()-dimensional anti-de Sitter spacetime. The exterior spacetime of the collapsing star is…
A class of conformally flat solutions for systems undergoing radiative gravitational collapse
Ranjan Sharma, Shyam Das, Ramesh Tikekar
We present a class of conformally flat solutions of the Einstein's field equations for spherical systems undergoing gravitational collapse accompanied with radial heat flux. The in…
Gravitational collapse in spatially isotropic coordinates
Megan Govender, Robert Bogadi, Ranjan Sharma +1
We investigate the dynamical nature of the collapse process of a spherically symmetric star in quasi-static hydrodynamical equilibrium. The star collapses from an initial static co…
Collapse of a relativistic self-gravitating star with radial heat flux: Impact of anisotropic stresses
Ranjan Sharma, Shyam Das
We develop a simple model for a self-gravitating spherically symmetric relativistic star which begins to collapse from an initially static configuration by dissipating energy in th…