Zobrazeno 1 - 10
of 186
pro vyhledávání: '"Mezzetti, Marino"'
Cosmologies including strongly Coupled (SC) Dark Energy (DE) and Warm dark matter (SCDEW) are based on a conformally invariant (CI) attractor solution modifying the early radiative expansion. Then, aside of radiation, a kinetic field $\Phi$ and a DM
Externí odkaz:
http://arxiv.org/abs/1703.05139
We study the effects of sample variance in N--body simulations, as a function of the size of the simulation box, namely in connection with predictions on tomographic shear spectra. We make use of a set of 8 $\Lambda$CDM simulations in boxes of 128, 2
Externí odkaz:
http://arxiv.org/abs/1406.5374
Autor:
Bonometto, Silvio A., Mezzetti, Marino
Publikováno v:
JCAP 05(2013)008
Forthcoming large angle surveys are planned to obtain high precision tomographic shear data. In principle, they will allow us to recover the spectra of matter density fluctuation, at various redshift, through the inversion of the expressions yielding
Externí odkaz:
http://arxiv.org/abs/1302.4926
Publikováno v:
New Astronomy, 26 (2014) 106--111
We assume the DE state equations w(a) = w_0+w_a(a_p-a), and study the dependence of the constraints on w_0 and w_a coefficients on the pivoting redshift 1+z_p=1/a_p. Coefficients are fitted to data including WMAP7, SNIa (Union 2.1), BAO's (including
Externí odkaz:
http://arxiv.org/abs/1211.7315
Autor:
Casarini, Luciano, Bonometto, Silvio A., Borgani, Stefano, Dolag, Klaus, Murante, Giuseppe, Mezzetti, Marino, Tornatore, Luca, La Vacca, Giuseppe
Forthcoming experiments will enable us to determine tomographic shear spectra at a high precision level. Most predictions about them have until now been biased on algorithms yielding the expected linear and non-linear spectrum of density fluctuations
Externí odkaz:
http://arxiv.org/abs/1203.5251
Forthcoming experiments will enable us to determine high precision tomographic shear spectra. Matter density fluctuation spectra, at various $z$, should then be worked out of them, in order to constrain the model and determine the DE state equation.
Externí odkaz:
http://arxiv.org/abs/1203.2777
Publikováno v:
MNRAS, Vol. 417 Issue 4 (November 2011), 2554-2561
Our new formulation of the Spherical Collapse Model (SCM-L) takes into account the presence of angular momentum associated with the motion of galaxy groups infalling towards the centre of galaxy clusters. The angular momentum is responsible for an ad
Externí odkaz:
http://arxiv.org/abs/1107.2390
Publikováno v:
Mon.Not.Roy.Astron.Soc.403:838-847,2010
We analyse a catalogue of simulated clusters within the theoretical framework of the Spherical Collapse Model (SCM), and demonstrate that the relation between the infall velocity of member galaxies and the cluster matter overdensity can be used to es
Externí odkaz:
http://arxiv.org/abs/0910.2882
Publikováno v:
Mon.Not.Roy.Astron.Soc.390:645-654,2008
We discuss a new criterion to estimate the mass in the outer, non-equilibrium region of galaxy clusters, where the galaxy dynamics is dominated by an overall infall motion towards the cluster centre. In the framework of the spherical infall model the
Externí odkaz:
http://arxiv.org/abs/0807.3239