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- Jadavpur UniversityIN38 papers
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11 papers · 1 filter
Accretions of Various Types of Dark Energies onto Morris-Thorne Wormhole
Ujjal Debnath
In this work, we have studied accretion of the dark energies onto Morris-Thorne wormhole. For quintessence like dark energy, the mass of the wormhole decreases and phantom like dar…
Constraining Red-shift Parametrization Parameters in Brans-Dicke Theory: Evolution of Open Confidence Contours
Ritabrata Biswas, Ujjal Debnath
In Brans Dicke theory of gravity, from the nature of the scalar field-potential considered, the dark energy, dark matter, radiation densities predicted by different observations an…
Exact interior solutions in (2 + 1) dimensional spacetime
Farook Rahaman, Piyali Bhar, Ritabrata Biswas +1
We provide a new class of exact solutions for the interior in (2 + 1) dimensional spacetime. The solutions obtained for the perfect fluid model both with and without cosmological c…
Reconstructing Einstein-Aether Gravity from Ordinary and Entropy-Corrected Holographic and New Agegraphic Dark Energy Models
Ujjal Debnath
Here we briefly discuss the Einstein-Aether gravity theory by modification of Einstein-Hilbert action. We find the modified Friedmann equations and then from the equations we find…
Constraining the Parameters of Modified Chaplygin Gas in Einstein-Aether Gravity
Ujjal Debnath
We have assumed FRW model of the universe in Einstein-Aether gravity filled with dark matter and Modified Chaplygin gas (MCG) type dark energy. We present the Hubble parameter in t…
Understanding Nuclei in the upper sd - shell
M. Saha Sarkar, Abhijit Bisoi, Sudatta Ray +2
Nuclei in the upper- shell usually exhibit characteristics of spherical single particle excitations. In the recent years, employment of sophisticated techniques of gamma spectr…