66 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Inter-University Centre for Astronomy and AstrophysicsIN9 papers
- Aryabhatta Research Institute of Observational SciencesIN6 papers
- Gauhati UniversityIN6 papers
- Christian-Albrechts-Universität zu KielDE4 papers
- National Astronomical Observatory of JapanJP4 papers
- Harish-Chandra Research InstituteIN3 papers
- Jamia Millia IslamiaIN3 papers
- Kobe UniversityJP3 papers
- The University of TokyoJP3 papers
- Astronomical Institute of the Slovak Academy of SciencesSK2 papers
- Chitkara UniversityIN2 papers
- Goddard Space Flight CenterUS2 papers
26 papers · 1 filter
Inflationary models in a minimally coupled gravity: Constraints from , BICEP/, and ACT
Biswajit Deb, Atri Deshamukhya
The advent of high-precision cosmological observations has challenged many traditional inflationary models. Data from 2018 along with the BICEP/ 2018 result have alr…
Infrared Extended Uncertainty Principle Corrections and Quintessence-Induced Topology of Reissner-Nordström AdS Black Holes
Y. Sekhmani, G. G. Luciano, S. N. Gashti +1
We present a unified topological and geometric analysis of charged Anti-de Sitter (AdS) black holes immersed in a quintessence field, incorporating infrared gravitational correctio…
Non-Equatorial Deflection of Light due to Kerr-Newman Black Hole: A Material Medium Approach
Saswati Roy, Shubham Kala, Prasanjit Ghosh +2
We explored the effect of space-time geometry on the trajectory of light rays in the context of a charged, rotating black hole. We derived an analytical expression for the deflecti…
Deflection of Light due to Kerr Sen Black Hole in Heterotic String Theory using Material Medium Approach
Saswati Roy, Shubham Kala, Atanu Singha +2
The deflection of light in the gravitational field of a massive body can be analyzed through diverse theoretical approaches. The null geodesic approach is commonly employed to calc…
Slow-roll Natural & Hilltop Inflation in Rastall Gravity
Isaac M. Vitohekpon, Biswajit Deb, Ines G. Salako +2
This study provides a concise analysis of inflation under Rastall gravity by examining three types of potential such as the power law, natural, and hilltop potentials. Choosing a m…
Quasinormal Modes, Grebody Factors, and Hawking Radiation Sparsity of Black Holes Influenced by a Global Monopole Charge in Kalb-Ramond Gravity
Anshuman Baruah, Yassine Sekhmani, Sunil Kumar Maurya +2
Kalb-Ramond (KR) gravity is an intriguing model incorporating local Lorentz violation, and black hole (BH) solutions are known to exist. In this study, we investigate some crucial…
Transformation equation for frames undergoing non-uniform acceleration such as SHM and rotational motion
Ranchhaigiri Brahma, A. K. Sen
Lorentz transformation equations provide us a set of relations between the spacetime coordinates as observed from two different inertial frames. In case, one of the frames is movin…
Slow-roll Hilltop Inflation in gravity
Biswajit Deb, Atri Deshamukhya
Over the last four decades, a number of modified gravity theories have been proposed to study cosmological phenomena as they can provide solutions for some of the shortcomings of E…
Traversable wormholes in gravity sourced by a cloud of strings
Parangam Goswami, Anshuman Baruah, Atri Deshamukhya
Wormhole solutions in General Relativity (GR) require \textit{exotic} matter sources that violate the null energy condition (NEC), and it is well known that higher-order modificati…
Quasinormal Modes and Bounding Greybody Factors of GUP-corrected Black Holes in Kalb-Ramond Gravity
Anshuman Baruah, Ali Övgün, Atri Deshamukhya
The vacuum expectation value of the non-minimally coupled Kalb-Ramond (KR) field leads to spontaneous local Lorentz symmetry violation, and static spherically symmetric solutions e…
Warm Inflation in gravity
Biswajit Deb, Sabina Yeasmin, Atri Deshamukhya
In this work, we explored warm inflation in the background of gravity in the strong dissipation regime. Considering scalar field for FLRW universe, we derived modified fie…
The space-time line element for static ellipsoidal objects
Ranchhaigiri Brahma, A. K. Sen
In this paper, we solved the Einstein's field equation and obtained a line element for static, ellipsoidal objects characterized by the linear eccentricity () instead of quadrup…
Non-commutative Wormholes in Gravity satisfying the Energy Conditions
Anshuman Baruah, Parangam Goswami, Atri Deshamukhya
Traversable wormholes in General Relativity (GR) require exotic matter sources that violate the null energy condition (NEC), and such behavior may be avoided in modified gravity. M…
Inflation in f(R,T) gravity with Double-Well potential
Biswajit Deb, Atri Deshamukhya
In this piece of work, we studied the inflation in the context of theory of gravity. We assumed the functional form of to be , where R is the Ric…
New Wormhole Solutions in a Viable Gravity Model
Anshuman Baruah, Parangam Goswami, Atri Deshamukhya
Traversable wormhole solutions in General Relativity require exotic matter sources that violate the null energy condition (NEC), and such behavior maybe avoided in modified gravity…
Traversable Wormholes in Higher Dimensional Theories of Gravity
Anshuman Baruah, Atri Deshamukhya
Wormhole solutions in classical General Relativity are unstable and hence non traversable. Morris and Thorne discovered a traversable wormhole solution that required the energy mom…
Frame-Dragging from Charged Rotating Body
Anuj Kumar Dubey, A. K. Sen
In the present paper, we have considered the three parameters: mass, charge and rotation to discuss their combined effect on frame dragging for a charged rotating body. If we consi…
The effect of gravitation on the polarization state of a light ray
T. Ghosh, A. K. Sen
In the present work the rotation of polarization vector due to the gravitational field of a rotating body has been derived, from the general expression of Maxwell's equation in the…
Deflection of light ray due to a charged body using Material Medium Approach
Saswati Roy, A. K. Sen
The gravitational deflection of light ray is an important prediction of General Theory of Relativity. In this paper we develop analytical expression of the deflection of light ray…
Light deflection in Kerr field for off-equatorial source
Sarani Chakraborty, A. K. Sen
Deflection angle for a light ray travelling in the equatorial plane of a rotating Kerr mass has been already calculated by various investigators. Considering the light ray to be tr…
Gravitational Redshift in Kerr - Newman Geometry
Anuj Kumar Dubey, A. K. Sen
It is well known fact that gravitational mass can alter the space time structure and gravitational redshift is one of its examples. Static electric or magnetic charge can also alte…
Trajectory of a light ray in Kerr field: A material medium approach
Saswati Roy, A. K. Sen
The deflection of light ray as it passes around a gravitational mass can be calculated by different methods. Such calculations are generally done by using the null geodesics under…
Light defection due to a charged, rotating body
Sarani Chakraborty, A. K. Sen
According to GTR and subsequent developments in the field, it is known that there are three factors namely mass, rotation and charge that can influence the space-time geometry. Acc…
An analysis of gravitational redshift from rotating body
Anuj Kumar Dubey, A K Sen
Gravitational redshift is generally calculated without considering the rotation of a body. Neglecting the rotation, the geometry of space time can be described by using the spheric…