Zobrazeno 1 - 10
of 146
pro vyhledávání: '"Tormen Giuseppe"'
In this paper we study the triaxial properties of dark matter haloes of a wide range of masses extracted from a set of cosmological N-body simulations. We measure the shape at different distances from the halo centre (characterised by different overd
Externí odkaz:
http://arxiv.org/abs/1605.04319
Autor:
Despali, Giulia, Giocoli, Carlo, Angulo, Raul E., Tormen, Giuseppe, Sheth, Ravi K., Baso, Giacomo, Moscardini, Lauro
The abundance of galaxy clusters can constrain both the geometry and growth of structure in our Universe. However, this probe could be significantly complicated by recent claims of nonuniversality -- non-trivial dependences with respect to the cosmol
Externí odkaz:
http://arxiv.org/abs/1507.05627
Autor:
Boldrin, Michele, Giocoli, Carlo, Meneghetti, Massimo, Moscardini, Lauro, Tormen, Giuseppe, Biviano, Andrea
The next generation of large sky photometric surveys will finally be able to use arc statistics as a cosmological probe. Here we present the first of a series of papers on this topic. In particular, we study how arc counts are sensitive to the variat
Externí odkaz:
http://arxiv.org/abs/1505.03515
Constraining the distribution of dark matter in dwarf spheroidal galaxies with stellar tidal streams
Publikováno v:
MNRAS 449, L46-L50 (2015)
We use high-resolution N-body simulations to follow the formation and evolution of tidal streams associated to dwarf spheroidal galaxies (dSphs). The dSph models are embedded in dark matter (DM) haloes with either a centrally-divergent 'cusp', or an
Externí odkaz:
http://arxiv.org/abs/1501.04968
In this paper, we study the formation and dynamical evolution of black hole-black hole (BH-BH) binaries in young star clusters (YSCs), by means of N-body simulations. The simulations include metallicity-dependent recipes for stellar evolution and ste
Externí odkaz:
http://arxiv.org/abs/1404.7147
We present a detailed analysis of dark matter halo shapes, studying how the distributions of ellipticity, prolateness and axial ratios evolve as a function of time and mass. With this purpose in mind, we analysed the results of three cosmological sim
Externí odkaz:
http://arxiv.org/abs/1404.6527
We describe an algorithm for identifying ellipsoidal haloes in numerical simulations, and quantify how the resulting estimates of halo mass and shape differ with respect to spherical halo finders. Haloes become more prolate when fit with ellipsoids,
Externí odkaz:
http://arxiv.org/abs/1212.4157
We develop a simple model for estimating the mass growth histories of dark matter halos. The model is based on a fit to the formation time distribution, where formation is defined as the earliest time that the main branch of the merger tree contains
Externí odkaz:
http://arxiv.org/abs/1111.6977
We combine the physics of the ellipsoidal collapse model with the excursion set theory to study the shapes of dark matter halos. In particular, we develop an analytic approximation to the nonlinear evolution that is more accurate than the Zeldovich a
Externí odkaz:
http://arxiv.org/abs/1010.2839
We present a new algorithm for identifying the substructure within simulated dark matter haloes. The method is an extension of that proposed by Tormen et al. (2004) and Giocoli et al. (2008a), which identifies a subhalo as a group of self-bound parti
Externí odkaz:
http://arxiv.org/abs/0911.0436