Himanshu Kumar

Himanshu Kumar
University of Delhi | DU · Department of Physics

Doctor of Philosophy

About

7
Publications
880
Reads
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13
Citations
Citations since 2016
2 Research Items
11 Citations
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201620172018201920202021202201234
201620172018201920202021202201234
201620172018201920202021202201234
Introduction
Himanshu Kumar currently works at the Department of Physics, University of Delhi. Himanshu does research in Theoretical Physics, Cosmology and Astronomy. Their current project is 'Surface layers in Gravity'.Also dark matter interactions and dark matter halos
Additional affiliations
July 2018 - present
Dyal Singh College
Position
  • Professor (Assistant)
Description
  • I am teaching the Physics Honours students here and helping summer internship research in physics in fields of Classical Gravity and Cosmology

Publications

Publications (7)
Article
Full-text available
With an aim to include the contribution of surface tension in the action of the boundary, we define the tangential pressure in terms of surface tension and Normal curvature in a more naturally geometric way. First, we show that the negative tangential pressure is independent of the four-velocity of a very thin hyper-surface. Second, we relate the 3...
Article
Full-text available
In this paper, we have tried to explore the twin paradox in the ellipsoidal coordinate system. We have investigated that the traveling twin travels away from the gravitational source in the first case while in the other it moves towards the source. We then tried to compare it with the special relativistic case where the static twin ages faster as c...
Article
Full-text available
We explore the low-energy cosmological dynamics of self-interacting cold dark matter (CDM). We argue in favor of the truly collisionless nature of CDM, which is self-interacting at small scales between epochs of equality and recombination. For this, we assume a model wherein a strongly coupled baryon-radiation plasma ejects out of small regions of...
Article
Full-text available
We explore the low energy cosmological dynamics of feebly self-interacting cold dark matter and propose a new simple explanation for the rotation curves of the core-halo model in massive LSB (Low Surface brightness)galaxies. We argue in favor of the truly collisionless nature of cold dark matter,which is feebly,self-interacting at small scales betw...
Article
Full-text available
With an aim to argue for the truly collisionless nature of cold dark matter between epochs of equality and recombination, we assume a model, wherein strongly coupled baryon-radiation plasma ejects out of small regions of concentrated cold dark matter without losing its equilibrium. We use the Meschersky equation to describe the dynamics of cold dar...
Article
In this paper, we explore the effect of gravity on the flow of proper time near static spherically symmetric black hole possessing an electric charge. We use the Reissner–Nordström metric. In the first case, the traveling twin travels away from the black hole and in the second it travels toward it. We then compare it with the case of relativistic k...

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