Zobrazeno 1 - 10
of 263
pro vyhledávání: '"Del Popolo, Antonino"'
Publikováno v:
Symmetry 12 (2020) 10, 1741
Motivated by the back-reaction debate, and~some unexplained characteristics of the CMB, we investigate the possibility of some anisotropy in the universe observed around us. To this aim, we build up a novel prediction for the Hubble law for the late
Externí odkaz:
http://arxiv.org/abs/2410.06102
Publikováno v:
Universe 6 (2020) 12, 222
Neutron stars change their structure with accumulation of dark matter. We study how their mass is influenced from the environment. Close to the sun, the dark matter accretion from the neutron star does not have any effect on it. Moving towards the ga
Externí odkaz:
http://arxiv.org/abs/2410.06078
Publikováno v:
Galaxies 6 (2018) 3, 67
In this paper, we show how baryonic physics can solve the problem of the striking diversity in dwarf galaxies rotation curves shapes. To this aim, we compare the distribution of galaxies of the SPARC sample, in the plane $V_{\rm 2 kpc}$-$V_{\rm Rlast
Externí odkaz:
http://arxiv.org/abs/2410.05948
In this study, we explore gravitational lensing using more realistic dark matter halo models, moving beyond the limitations of spherical-collapse approximations. Through analytical calculations employing various mass functions, we address critical fa
Externí odkaz:
http://arxiv.org/abs/2405.20256
Autor:
Del Popolo, Antonino, Chan, Man Ho
Publikováno v:
Physics of the Dark Universe, 43, 101393 (2024)
In this paper, we test one of the predictions of the Scale Invariant Vacuum (SIV) theory on MOND. According to that theory, MOND's acceleration $a_0$ is not a universal quantity but depends on several parameters, including time. To check this predict
Externí odkaz:
http://arxiv.org/abs/2405.01841
We explore the impact of dynamical friction on cosmological scales and show its influence on the evolution of perturbations. In particular, considering smooth and clustering dark energy models, we describe the role played by friction by selecting two
Externí odkaz:
http://arxiv.org/abs/2404.07313
We present N-body simulations of the process of bulge formation in disc galaxies due to inward migration of massive stellar clumps. The process is accompanied by dark halo heating, with a quasi-isothermal core replacing the initial central density cu
Externí odkaz:
http://arxiv.org/abs/2312.05316
Publikováno v:
Physics of the Dark Universe (2024)
Ultradense dark matter halos (UDMHs) are high concentrations of dark matter, assumed to have formed deep in the radiation-dominated era from amplified primordial perturbations. In this work we improve the previous works for the calculation of UDMH ab
Externí odkaz:
http://arxiv.org/abs/2311.15307
Publikováno v:
Mon.Not.Roy.Astron.Soc., 527 (2023) 4483-4504; Mon.Not.Roy.Astron.Soc. 531 (2024) 4, 4263-4274 (erratum)
This paper investigates a hypothesis proposed in previous research relating neutron star (NS) mass and its dark matter (DM) accumulation. As DM accumulates, NS mass decreases, predicting lower NS masses toward the Galactic center. Due to limited NSs
Externí odkaz:
http://arxiv.org/abs/2311.00113