Zobrazeno 1 - 10
of 7 651
pro vyhledávání: '"COLD DARK-MATTER"'
Publikováno v:
East European Journal of Physics, Iss 3, Pp 56-70 (2024)
In this work, we construct a spatially homogeneous and anisotropic Bianchi type-V cosmological model with a hybrid expansion law by considering the universe to be filled with cold dark matter and non-interacting Barrow holographic dark energy with Gr
Externí odkaz:
https://doaj.org/article/e3021461dbb742baaac897ebeae1c973
Autor:
Chandra Rekha Mahanta, Dibyajyoti Das
Publikováno v:
East European Journal of Physics, Iss 1, Pp 55-69 (2024)
In this paper, we study a spatially homogeneous and anisotropic Bianchi type-III universe containing cold dark matter and Barrow holographic dark energy within the framework of General Relativity. We assume the cold dark matter and Barrow holographic
Externí odkaz:
https://doaj.org/article/45792441588043968f53865909a95052
Publikováno v:
Universe, Vol 10, Iss 10, p 385 (2024)
The Large and Small Magellanic Clouds (LMC and SMC) form the closest interacting galactic system to the Milky Way, therewith providing a laboratory to test cosmological models in the local Universe. We quantify the likelihood for the Magellanic Cloud
Externí odkaz:
https://doaj.org/article/491dcf8240644550aaa3a088727c2d2b
Publikováno v:
The Astrophysical Journal Letters, Vol 973, Iss 1, p L15 (2024)
Unraveling the nature of dark matter (DM) stands as a primary objective in modern physics. Here we present evidence suggesting deviations from the collisionless cold DM (CDM) paradigm. It arises from the radial distribution of stars in six ultrafaint
Externí odkaz:
https://doaj.org/article/79c3ffb508d84d77be6bff292a2d0aa7
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 135 (2024)
The dark matter subhalos orbiting in a galactic halo perturb the orbits of stars in thin stellar streams. Over time, the random velocities in the streams develop non-Gaussian wings. The rate of velocity increase is approximately a random walk at a ra
Externí odkaz:
https://doaj.org/article/1564a3d1cdd94fb783934b5c754fbee1
Autor:
Simon Rozier, Raphaël Errani
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 91 (2024)
Placed slightly out of dynamical equilibrium, an isolated stellar system quickly returns toward a steady virialized state. We study this process of collisionless relaxation using the matrix method of linear response theory. We show that the full phas
Externí odkaz:
https://doaj.org/article/465b3506309945a39fd35d7622b94ee4
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 2, p 186 (2024)
Low-surface-brightness galaxies are excellent laboratories, where stars and baryonic matter act as tracers of the gravitational potential of the dark matter halo. If dark matter is modeled as a perfect fluid, then spherically symmetric and static dar
Externí odkaz:
https://doaj.org/article/385751ff570147a9963398d2a2171cae
Autor:
Cosmin Ilie
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 2, p 159 (2024)
Any astrophysical object can, in principle, serve as a probe of the interaction between dark matter (DM) and regular baryonic matter. This method is based on the potential observable consequences annihilations of captured DM have on the surface tempe
Externí odkaz:
https://doaj.org/article/2c29d06936a64107b1a7cefe8b1b2010
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 89 (2024)
A fundamental prediction of the Lambda cold dark matter cosmology is the centrally divergent cuspy density profile of dark matter haloes. Density cusps render cold dark matter haloes resilient to tides, and protect dwarf galaxies embedded in them fro
Externí odkaz:
https://doaj.org/article/3046ee84193144408e706918fb3285e4
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 2, p 235 (2024)
In this work, we investigate the merger rate of primordial black hole–neutron star (PBH-NS) binaries in two widely studied modified gravity (MG) models: Hu–Sawicki f ( R ) gravity and the normal branch of Dvali–Gabadadze–Porrati gravity. In o
Externí odkaz:
https://doaj.org/article/252559aed9ff4452bf518c09f683e1fe