Zobrazeno 1 - 10
of 163
pro vyhledávání: '"Labini, Francesco Sylos"'
We show that the rotation curves of 16 nearby disc galaxies in the THINGS sample and the Milky Way can be described by the NFW halo model and by the Bosma effect at approximately the same level of accuracy. The latter effect suggests that the behavio
Externí odkaz:
http://arxiv.org/abs/2310.15673
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 524, Issue 1, pp.1560-1600, 2023
Disk galaxies are typically in a stable configuration where matter moves in almost closed circular orbits. However, non-circular motions caused by distortions, warps, lopsidedness, or satellite interactions are common and leave distinct signatures on
Externí odkaz:
http://arxiv.org/abs/2306.12902
We generalize previously derived analytic results for the one-loop power spectrum (PS) in scale-free models (with linear PS $P(k) \propto k^n$) to a broader class of such models in which part of the matterlike component driving the Einstein de Sitter
Externí odkaz:
http://arxiv.org/abs/2304.12013
Autor:
Cosmai, Leonardo, Fanizza, Giuseppe, Labini, Francesco Sylos, Pietronero, Luciano, Tedesco, Luigi
We reply to the criticisms moved in [1] against our results presented in [2]. In particular, we show that our fractal model has none of the problems claimed in [1]. The latters can be addressed to the overlooked nonlinear behaviour of the Einstein's
Externí odkaz:
http://arxiv.org/abs/2302.04679
Autor:
Labini, Francesco Sylos, Chrobakova, Zofia, Capuzzo-Dolcetta, Roberto, Lopez-Corredoira, Martin
Publikováno v:
2023 ApJ 945 3
We use data from the Gaia DR3 dataset to estimate the mass of the Milky Way (MW) by analyzing the rotation curve in the range of distances 5 kpc to 28 kpc. We consider three mass models: the first model adds a spherical dark matter (DM) halo, followi
Externí odkaz:
http://arxiv.org/abs/2302.01379
We apply a statistical deconvolution of the parallax errors based on Lucy's inversion method (LIM) to the Gaia-DR3 sources to measure their three dimensional velocity components in the range of Galactocentric distances $R$ between 8 kpc and 30 kpc wi
Externí odkaz:
http://arxiv.org/abs/2211.05668
Using controlled numerical N-body experiments, we show how, in the collapse dynamics of an initially cold and uniform distribution of particles with a generic asymmetric shape, finite $N$ fluctuations and perturbations induced by the anisotropic grav
Externí odkaz:
http://arxiv.org/abs/2106.02388
Publikováno v:
A&A 651, A114 (2021)
The statistical characterization of the distribution of visible matter in the universe is a central problem in modern cosmology. In this respect, a crucial question still lacking a definitive answer concerns how large are the greatest structures in t
Externí odkaz:
http://arxiv.org/abs/2105.06110
Publikováno v:
A&A 643, A118 (2020)
Initially far out-of-equilibrium self-gravitating systems form, through a collisionless relaxation dynamics, quasi-stationary states (QSS). These may arise from a bottom-up aggregation of structures or in a top-down frame; their quasi-equilibrium pro
Externí odkaz:
http://arxiv.org/abs/2009.11624
Publikováno v:
Phys. Rev. E 102, 042108 (2020)
By means of simple dynamical experiments we study the combined effect of gravitational and gas dynamics in the evolution of an initially out-of-equilibrium, uniform and rotating massive over-density thought of as in isolation. The rapid variation of
Externí odkaz:
http://arxiv.org/abs/2008.02605