Zobrazeno 1 - 10
of 47 351
pro vyhledávání: '"Cosmological Models"'
Bounce cosmological models containing a dark viscous fluid in a spatially flat Friedmann-Robertson-Walker (FRW) universe are considered. The universe evolution is described in terms of generalized equation of state (EoS) parameters, in presence of th
Externí odkaz:
http://arxiv.org/abs/2411.11456
Autor:
Pavluchenko, Sergey
Publikováno v:
Universe 2024, 10(11), 429
In the current review, we provide a summary of the recent progress made in the cosmological aspect of extra-dimensional Lovelock gravity. Our review covers a wide variety of particular model/matter source combinations: Einstein--Gauss--Bonnet as well
Externí odkaz:
http://arxiv.org/abs/2412.00414
Publikováno v:
MNRAS Letters 537 (2025) L55
We present a new, cosmologically model-independent, statistical analysis of the Pantheon+ type Ia supernovae spectroscopic dataset, improving a standard methodology adopted by Lane et al. We use the Tripp equation for supernova standardisation alone,
Externí odkaz:
http://arxiv.org/abs/2412.15143
The evolution of the Hubble parameter $H(z)$ with redshift $z$ is estimated from the Pantheon+ data of Type Ia supernovae, for the $\Lambda$CDM model and the three special cases of the eternal coasting (EC) cosmological model with three different spa
Externí odkaz:
http://arxiv.org/abs/2412.14184
This study delves into the cosmological implications of the $f(Q,C)$ modified gravity framework within the context of the FLRW spacetime which offers a dynamic alternative to the standard $\Lambda$CDM cosmology. Here, we define the transit form of Hu
Externí odkaz:
http://arxiv.org/abs/2412.01164
$\Lambda$CDM provides a leading framework in the interpretation of modern cosmology. Nevertheless, the scientific community still struggles with many open problems in cosmology. Among the most noticeable ones, the tension in the Hubble constant $H_0$
Externí odkaz:
http://arxiv.org/abs/2411.05744
Autor:
Ignat'ev, Yu. G., Samigullina, A. R.
Cosmological models based on an asymmetric scalar Higgs doublet (canonical $\Phi$ and phantom $\phi$ fields) with potential interaction between the components are proposed. A qualitative analysis of the corresponding dynamic systems is performed and
Externí odkaz:
http://arxiv.org/abs/2410.10703
Autor:
Maurya, Dinesh Chandra
Publikováno v:
Int. J. Geom. Meth. Mod. Phys., (2025) 2550028
In the present paper, we investigate constrained transit cosmological models in the most recent proposed modified gravity theory, $f(R,L_{m},T)$-gravity. We obtain the modified field equations for a flat homogeneous and isotropic Friedmann-Lema\^{\i}
Externí odkaz:
http://arxiv.org/abs/2409.14024
We explores the Pantheon+SH0ES dataset to identify patterns that can discriminate between different cosmological models. We focus on determining whether the behaviour of dark energy is consistent with the standard $\Lambda$CDM model or suggests novel
Externí odkaz:
http://arxiv.org/abs/2408.01563