Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Kar, Alokananda"'
Publikováno v:
JHEP 07 (2024) 016
In [arXiv:2105.06455, arXiv:2206.04538], the authors have been able to argue for an ultra-local version of the second law of black hole mechanics, for arbitrary diffeomorphism invariant theories of gravity non-minimally coupled to matter fields, by c
Externí odkaz:
http://arxiv.org/abs/2403.04749
In this chapter we have introduced a special type of non-linear equation of state to discuss the cosmological evolution mechanism. The new equation of state is a four parameters model which can be represented as $p=A\rho+B\rho^2-\frac{C}{\rho^{\alpha
Externí odkaz:
http://arxiv.org/abs/2304.06481
Autor:
Kar, Alokananda, Sadhukhan, Shouvik
In the present chapter, we have established multiple fluid cosmological models under interaction scenarios. the interaction model we have established is a binary type of interaction scenario where three types of fluids are bound with interaction. We
Externí odkaz:
http://arxiv.org/abs/2304.06472
Publikováno v:
Indian Journal of Physics (2022)
In this paper we have discussed the modified gravity and scalar field DE model specifically DBI essence model with the analysis of thermodynamics during cosmological evolution. We have used the modified gravity with the form f(R,T)=R+2\Lambda T in ou
Externí odkaz:
http://arxiv.org/abs/2206.00464
Autor:
de la Fuente, Manuel Malaver, Iyer, Rajan, Kar, Alokananda, Sadhukhan, Shouvik, Upadhyay, Sudhaker, Gudekli, Ertan
The present work contains a discussion on compact stellar body that is influenced by the effects electromagnetic fields. We have tried to discuss a solution of Einstein-Maxwell field equation with the interpretation of Buchdahl spacetime type functio
Externí odkaz:
http://arxiv.org/abs/2204.00981
Publikováno v:
Modern Physics Letters A 2150262, (2021)
In this paper, we have used the reconstructed DBI-essence dark energy density to modify the mass accretions of black holes and wormholes. In general, the black hole mass accretion does not depend on the metric or local Einstein geometry. That is why
Externí odkaz:
http://arxiv.org/abs/2112.15432
Autor:
Kar, Alokananda, Gupta, Nayantara
Publikováno v:
The Astrophysical Journal, 926:110, (2022)
The discovery of the sources of ultra-high energy photons by High-Altitude Water Cerenkov Gamma ray Observatory and Large High Altitude Air Shower Observatory in our Galaxy has revolutionised the field of gamma ray astronomy in the last few years. Th
Externí odkaz:
http://arxiv.org/abs/2112.08757
Publikováno v:
International Journal of Geometric Methods in Modern Physics, Vol. 18, No. 08, 2150131 (2021)
In this paper we study two different cases of inhomogeneous EOS of the form p_d = \omega(t)\rho_d+w_1 f(H, t) . We derive the energy density of dark fluid and dark matter component for both the cases. Further we calculate the evolution of energy dens
Externí odkaz:
http://arxiv.org/abs/2111.01535
Publikováno v:
Eur. Phys. J. C 81, 934 (2021)
The following paper has been motivated from recent works of Kremer, G.M [1, 4], Vardiashvili, G [2], Jantsch, R.C [3], Capozziello, S [5] on Van-Der-Waals EOS cosmology. The main aim for this paper is to analyze the thermodynamics of a Non-linear sys
Externí odkaz:
http://arxiv.org/abs/2110.13831
In this paper we have studied Van-Der-Waals fluid system with the generalized EOS as as discussed in the recent works of Kremer, G.M [1, 4], Vardiashvili, G [2], Jantsch, R.C [3], Capozziello, S [5]. and are functions of energy density and time that
Externí odkaz:
http://arxiv.org/abs/2110.13836