Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Pacif, Shibesh Kumar Jas"'
Autor:
Chaudhary, Himanshu, Debnath, Ujjal, Pacif, Shibesh Kumar Jas, Molla, Niyaz Uddin, Mustafa, G., Maurya, S. K.
This study investigates the accelerated cosmic expansion within the Ho\v{r}ava-Lifshitz Model. To constrain the cosmological parameters of this model, we incorporate 17 Baryon Acoustic Oscillation points, 31 Cosmic Chronometer points, 40 Type Ia Supe
Externí odkaz:
http://arxiv.org/abs/2402.12324
This study examines five models derived from the Pacif parametrization scheme of the Hubble parameter ($H$), yielding various linear to quintic forms of the deceleration parameter (DP). Our goal is to explore the impact of these DP variations on late
Externí odkaz:
http://arxiv.org/abs/2402.10499
Autor:
Jaiswal, Annu, Kumar, Rajesh, Srivastava, Sudhir Kumar, Govender, Megandhren, Pacif, Shibesh Kumar Jas
In this work, we have investigated a novel aspect of black hole (BH) formation during the collapse of a self-gravitating configuration. The exact solution of the Einstein field equations is obtained in a model-independent way by considering a paramet
Externí odkaz:
http://arxiv.org/abs/2310.17647
This manuscript presents a diagnostic analysis of three dark energy models resulting from the parametrization of the deceleration parameter. These models exhibit intriguing features, including late-time acceleration and a cosmological phase transitio
Externí odkaz:
http://arxiv.org/abs/2304.09749
Our objective in this paper is to study the late-time behavior of the universe in a model resulting from a parametrization of the Hubble parameter ($H$) in $f(Q,T)$ gravity. We have considered the flat Friedmann-Lemaitre-Robertson-Walker (FLRW) as th
Externí odkaz:
http://arxiv.org/abs/2304.09163
Publikováno v:
Physics of the Dark Universe Volume 40, 101211, May 2023
In this paper, we have studied an interacting dark energy model. We have assumed the gravitational interaction between the matter fields i.e. between barotropic fluid and the dark energy. The dark energy evolution within the framework of spatially ho
Externí odkaz:
http://arxiv.org/abs/2301.08743
We investigate the validity of cosmological models with an oscillating scale factor in relation to late-time cosmological observations. We show that these models not only meet the required late time observational constraints but can also alleviate th
Externí odkaz:
http://arxiv.org/abs/2205.13514
The current paper provides a comprehensive examination of a dark energy cosmological model in the classical regime, in which a generic scalar field is regarded as a dark energy source. Einstein's field equations are solved in model independent way i.
Externí odkaz:
http://arxiv.org/abs/2203.13992
We study a scenario based upon a mass-less $\lambda \phi^4$ theory coupled to massive neutrino matter with $Z_2$ symmetry using a conformal coupling, $A(\phi)=1-\alpha\phi^2/2M_{pl}^2;~\alpha=M^2_{pl}/M^2$ where $M$ is a cut off mass. The chosen coup
Externí odkaz:
http://arxiv.org/abs/2108.08913
Publikováno v:
European Physical Journal Plus 136, 875 (2021)
In this paper, we have considered a quadratic variation of the deceleration parameter ($q$) as a function of cosmic time ($t$) which describes a smooth transition from the decelerating phase of the Universe to an accelerating one and also show some d
Externí odkaz:
http://arxiv.org/abs/2108.06077