Zobrazeno 1 - 10
of 15 332
pro vyhledávání: '"Cosmological Evolution"'
Autor:
Aydemir, Ufuk, Elbistan, Mahmut
Breaking diffeomorphism invariance has been motivated in the literature in several contexts, including emergent General Relativity (GR). For this to be an admissible possibility, GR augmented with minor violations of general covariance must yield onl
Externí odkaz:
http://arxiv.org/abs/2412.07848
In this paper, we study the cosmological evolution of a viscous dark energy model within the framework of $f(Q, C)$ gravity, utilizing a two-fluid approach. The model incorporates non-metricity and boundary contributions to the total action, represen
Externí odkaz:
http://arxiv.org/abs/2411.00910
We present the findings of a comprehensive and detailed analysis of merger tree data from ultra-high-resolution cosmological $N$-body simulations. The analysis, conducted with a particle mass resolution of $5 \times 10^3 h^{-1} M_{\odot}$ and a halo
Externí odkaz:
http://arxiv.org/abs/2410.22185
Autor:
Rafelski, Johann, Birrell, Jeremiah, Grayson, Christopher, Steinmetz, Andrew, Yang, Cheng Tao
We describe in the context of the particle physics (PP) standard model (SM) `PP-SM' the understanding of the primordial properties and composition of the Universe in the temperature range $130\GeV>T>20\keV$. The Universe evolution is described using
Externí odkaz:
http://arxiv.org/abs/2409.19031
Publikováno v:
Phys. Dark Universe 46, 101664 (2024)
This study explores the extension of teleparallel gravity within the framework of general relativity, introducing an algebraic function $f(T)$ dependent on the torsion scalar $T$. Motivated by the teleparallel formulation, we investigate cosmological
Externí odkaz:
http://arxiv.org/abs/2409.10757
Autor:
Osano, Bob
We study two transition periods in cosmology: radiation-to-matter and matter-to-dark energy. In each case, we define a new parameter $\chi$ given by the ratios of the two energy densities involved in the transition. Our study of the second epoch is m
Externí odkaz:
http://arxiv.org/abs/2406.00506
Autor:
Li, Zefeng, Grand, Robert J. J., Wisnioski, Emily, Mendel, J. Trevor, Krumholz, Mark R., Ting, Yuan-Sen, Pakmor, Ruediger, Gómez, Facundo A., Marinacci, Federico, Ciucă, Ioana
We study the cosmological evolution of the two-point correlation functions of galactic gas-phase metal distributions using the 28 simulated galaxies from the Auriga Project. Using mock observations of the $z = 0$ snapshots to mimic our past work, we
Externí odkaz:
http://arxiv.org/abs/2402.08632
Publikováno v:
EPJC 84 (2024) 569
We split the total matter fluid into a bound (halo) component and an unbound (free particles) fluid component that is accreted by the halos. We adopt a different framework that treats the structure formation problem as a gravitational interaction bet
Externí odkaz:
http://arxiv.org/abs/2403.01986
Autor:
Jose, Charles, Chamandy, Luke, Shukurov, Anvar, Subramanian, Kandaswamy, Rodrigues, Luiz Felippe S., Baugh, Carlton M.
We explore the redshift evolution of the radio luminosity function (RLF) of star-forming galaxies using GALFORM, a semi-analytic model of galaxy formation and a dynamo model of the magnetic field evolving in a galaxy. Assuming energy equipartition be
Externí odkaz:
http://arxiv.org/abs/2402.15099
Autor:
Ignat'ev, Yu. G., Samigullina, A. R.
A study and numerical modeling of the cosmological evolution of a classical scalar field with the Higgs potential was carried out. Based on the formulated similarity properties of cosmological models, their main characteristics are studied for models
Externí odkaz:
http://arxiv.org/abs/2312.05944