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Radial profile and log-normal fluctuations of intra-cluster medium as an origin of systematic bias of spectroscopic temperature
Hajime Kawahara, Yasushi Suto, Tetsu Kitayama +4
The origin of the recently reported systematic bias in the spectroscopic temperature of galaxy clusters is investigated using cosmological hydrodynamical simulations. We find that…
Properties of the galaxy population in hydrodynamical simulations of clusters
A. Saro, S. Borgani, L. Tornatore +5
We present a study of the galaxy population predicted by hydrodynamical simulations for a set of 19 galaxy clusters based on the GADGET-2 Tree+SPH code. These simulations include g…
Simulated X-ray galaxy clusters at the virial radius: slopes of the gas density, temperature and surface brightness profiles
M. Roncarelli, S. Ettori, K. Dolag +3
Using a set of hydrodynamical simulations of 9 galaxy clusters with masses in the range 1.5 10^{14} M_sun < M_vir < 3.4 10^{15} M_sun, we have studied the density, temperature and…
The intracluster magnetic field power spectrum in Abell 2255
F. Govoni, M. Murgia, L. Feretti +3
The goal of this work is to constrain the strength and structure of the magnetic field in the nearby cluster of galaxies A2255. At radio wavelengths A2255 is characterized by the p…
Early structure formation in quintessence models and its implications for cosmic reionisation from first stars
U. Maio, K. Dolag, M. Meneghetti +5
We present the first hydrodynamic N-body simulations of primordial gas clouds responsible for the reionisation process in dark energy cosmologies. We compare the cosmological const…
Arc sensitivity to cluster ellipticity, asymmetries and substructures
Massimo Meneghetti, Rodolfo Argazzi, Francesco Pace +5
We investigate how ellipticity, asymmetries and substructures separately affect the ability of galaxy clusters to produce strong lensing events, i.e. gravitational arcs, and how th…