Zobrazeno 1 - 10
of 386
pro vyhledávání: '"Jackson, Levi"'
Autor:
Naseer, Tayyab, Said, Jackson Levi
Publikováno v:
Eur. Phys. J. C 84(2024)808
In this paper, we explore the existence of various non-singular compact stellar solutions influenced by the Maxwell field within the matter-geometry coupling based modified gravity. We start this analysis by considering a static spherically symmetric
Externí odkaz:
http://arxiv.org/abs/2409.00916
Compact stars have long served as a test bed of gravitational models and their coupling with stellar matter. In this work, we explore the behavior of an exponential model in f(T) gravity through the Tolman-Oppenheimer-Volkoff equation. This is perfor
Externí odkaz:
http://arxiv.org/abs/2406.05771
In this work, we present independent determinations of cosmological parameters and new constraints on $f(T)$ cosmologies, employing two new catalogs related to HII galaxy Hubble and CMB distance priors, along with the local standard measurements, SNI
Externí odkaz:
http://arxiv.org/abs/2405.06633
The Special Issue on "Modified Gravity Approaches to the Tensions of $\Lambda$CDM"} in the Universe journal tackles significant challenges faced by the $\Lambda$CDM model, including discrepancies in the Hubble constant, growth rate of structures, and
Externí odkaz:
http://arxiv.org/abs/2404.13981
There have been several works that have studied scalar cosmological perturbations in $f(T)$ teleparallel gravity theories to understand early cosmic times dynamics. In this direction, the perturbations presented have been performed by considering $f(
Externí odkaz:
http://arxiv.org/abs/2403.13708
Scalar-tensor theories have taken on a key role in attempts to confront the growing open questions in standard cosmology. It is important to understand entirely their dynamics at perturbative level including any possible spatial dependence in their g
Externí odkaz:
http://arxiv.org/abs/2403.10240
The strengthening of tensions in the cosmological parameters has led to a reconsideration of fundamental aspects of standard cosmology. The tension in the Hubble constant can also be viewed as a tension between local and early Universe constraints on
Externí odkaz:
http://arxiv.org/abs/2402.10502
Autor:
Santos, Fabiano F., Said, Jackson Levi
Scalar-tensor theories have shown promise in many sectors of cosmology. However, recent constraints from the speed of gravitational waves have put severe limits on the breadth of models such classes of theories can realize. In this work, we explore t
Externí odkaz:
http://arxiv.org/abs/2401.03558
Autor:
Ahmedov, Bobomurat, Dialektopoulos, Konstantinos F., Said, Jackson Levi, Nosirov, Abdurakhmon, Oikonomopoulou, Zinovia, Yunusov, Odil
In order to have singularity-free solutions at the beginning of the Universe, we need to violate the null energy condition. In the general class of Horndeski gravity, there are healthy NEC-violating solutions, which however are plagued with instabili
Externí odkaz:
http://arxiv.org/abs/2311.11977
Publikováno v:
Eur.Phys.J.C 83 (2023) 11, 1017
The pursuit of understanding the mysteries surrounding dark energy has sparked significant interest within the field of cosmology. While conventional approaches, such as the cosmological constant, have been extensively explored, alternative theories
Externí odkaz:
http://arxiv.org/abs/2310.20222