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pro vyhledávání: '"Valdarnini, R"'
Autor:
Valdarnini, R.
We use a large set N-body/hydrodynamical simulations to study the physical properties of the merging cluster El Gordo. We find that the observed X-ray structures, along with other data, can be matched fairly well by simulations with collision velocit
Externí odkaz:
http://arxiv.org/abs/2309.10374
Autor:
Valdarnini, R., Sarazin, C. L.
We present results from a suite of binary merging cluster simulations. The hydrodynamical cluster simulations are performed employing a smoothed particle hydrodynamics (SPH) formulation in which gradient errors are strongly reduced by means of an int
Externí odkaz:
http://arxiv.org/abs/2104.08358
Autor:
Valdarnini, R.
We present results from a large set of N-body/SPH hydrodynamical cluster simulations aimed at studying the statistical properties of turbulence in the ICM. The numerical hydrodynamical scheme employs a SPH formulation in which gradient errors are str
Externí odkaz:
http://arxiv.org/abs/1902.07291
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Autor:
Valdarnini, R.
In this paper we present results from a series of hydrodynamical tests aimed at validating the performance of a smoothed particle hydrodynamics (SPH) formulation in which gradients are derived from an integral approach. We specifically investigate th
Externí odkaz:
http://arxiv.org/abs/1608.08361
Autor:
Valdarnini, R.
This paper investigates the hydrodynamic performances of an SPH code incorporating an artificial heat conductivity term in which the adopted signal velocity is applicable when gravity is present. In accordance with previous findings it is shown that
Externí odkaz:
http://arxiv.org/abs/1207.6980
Autor:
Valdarnini, R.
A SPH code employing a time-dependent artificial viscosity scheme is used to construct a large set of N-body/SPH cluster simulations for studying the impact of artificial viscosity on the thermodynamics of the ICM and its velocity field statistical p
Externí odkaz:
http://arxiv.org/abs/1010.3378
Autor:
Valdarnini, R.
Publikováno v:
New Astron. 12 (2006) 71-93
Results from a large sample of hydrodynamical/N-body simulations of galaxy clusters in a LCDM cosmology are used to simulate cluster X-ray observations as expected from Chandra observations. The physical modeling of the gas includes radiative cooling
Externí odkaz:
http://arxiv.org/abs/astro-ph/0606481
Autor:
Valdarnini, R.
Results from a large set of hydrodynamical SPH simulations of galaxy clusters in a flat LCDM cosmology are used to investigate cluster X-ray properties. The physical modeling of the gas includes radiative cooling, star formation, energy feedback and
Externí odkaz:
http://arxiv.org/abs/astro-ph/0310203
Autor:
Valdarnini, R.
Publikováno v:
New Astron. 8 (2003) 691-710
I describe here the performance of a parallel treecode with individual particle timesteps. The code is based on the Barnes-Hut algorithm and runs cosmological N-body simulations on parallel machines with a distributed memory architecture using the MP
Externí odkaz:
http://arxiv.org/abs/astro-ph/0303413