The Quark-Hadron Transition in the Early Universe (2009)
Sassi, Giandomenico, Bonometto, Silvio A.
We use recent lattice QCD outputs to work out the expansion law of the Universe during the cosmological quark--hadron transition. To do so, a suitable technique to exploit both pressure and energy...
Dynamical Dark Energy simulations: high accuracy Power Spectra at high redshift (2008)
Casarini, Luciano, Maccio', Andrea V., Bonometto, Silvio A.
Accurate predictions on non--linear power spectra, at various redshift z, will be a basic tool to interpret cosmological data from next generation mass probes, so obtaining key information on Dark...
Dark Matter - Dark Energy coupling biasing parameter estimates from CMB data (2008)
La Vacca, Giuseppe, Colombo, Loris P. L., Vergani, Luca, Bonometto, Silvio A.
When CMB data are used to derive cosmological parameters, their very choice does matter: some parameter values can be biased if the parameter space does not cover the "true" model. This is a problem,...
Cosmologies with dynamical and coupled Dark Energy vs. CMB data (2006)
Bonometto, Silvio A., Casarini, Luciano, Colombo, Loris P. L., Mainini, Roberto
We compare a large set of cosmologies with WMAP data, performing a fit based on a MCMC algorithm. Besides of LCDM models, we take dynamical DE models, where DE and DM are uncoupled or coupled, both...
Dark Matter and Dark Energy from a single scalar field (2005)
Mainini, Roberto, Colombo, Loris, Bonometto, Silvio A.
The strong CP problem was solved by Peccei & Quinn by introducing axions, which are a viable candidate for DM. Here the PQ approach is modified so to yield also Dark Energy (DE), which arises in fair...
Dark Matter and Dark Energy from a single scalar field and CMB data (2005)
Mainini, Roberto, Colombo, Loris P. L., Bonometto, Silvio A.
Axions are likely to be the Dark Matter (DM) that cosmological data require. They arise in the Peccei Quinn solution of the strong CP problem. In a previous work we showed that their model has a...
Dark Matter and Dark Energy from the solution of the strong CP problem (2004)
Mainini, Roberto, Bonometto, Silvio A.
The Peccei Quinn (PQ) solution of the strong CP problem requires the existence of axions, which are a viable candidate for Dark Matter. Here we show that, if the Nambu Goldstone potential of the PQ...
N-body simulations for coupled dark energy: halo mass function and density profiles (2003)
Maccio', Andrea V., Quercellini, Claudia, Mainini, Roberto, Amendola, Luca, Bonometto, Silvio A.
We present the results of a series of N-body simulations in cosmologies where dark matter (DM) is coupled to dark energy (DE), so easing the cosmic coincidence problem. The dark-dark coupling...
Global cluster morphology and its evolution: X-ray data vs CDM, LCDM and mixed models (1999)
Valdarnini, Riccardo, Ghizzardi, Simona, Bonometto, Silvio A.
CMB and large-scale structure as a test of mixed models with n > 1 (1999)
Pierpaoli, Elena, Bonometto, Silvio A.
We compute CBR anisotropies in mixed models with different hot components, including neutrinos or volatile HDM arising from the decay of heavier particles. The CBR power spectra of these models...
Statistics of matter distribution from halo dynamics (1989)
Bonometto, Silvio A., Borgani, Stefano, Persic, Massimo, Salucci, Paolo
A study of the cosmological quark-hadron transition (1987)
Bonometto, Silvio A., Miller, John C., Pantano, Ornella
1986/1987
Nature of dark matter and pancake mass (1984)
Bonometto, Silvio A., Valdarnini, Riccardo
If dark matter is made of collisionless particles a relation holds between the mass m of such particles, the primordial spectral index n, and the “pancake” mass. The case of dark matter of two...