X-ray and strong lensing mass estimate of MS2137.3-2353 (2009)
Donnarumma, Annamaria, Ettori, Stefano, Meneghetti, Massimo, Moscardini, Lauro
We present new mass estimates of the galaxy cluster MS2137.3-2353, inferred from X-ray and strong lensing analyses. This cluster exhibits an outstanding strong lensing configuration and indicates a...
Meneghetti, Massimo, Melchior, Peter, Grazian, Andrea, De Lucia, Gabriella, Dolag, Klaus, Bartelmann, Matthias, ...
We present a newly developed code that allows simulations of optical observations of galaxy fields with a variety of instruments. The code incorporates gravitational lensing effects and is targetted...
Maio, Umberto, Dolag, Klaus, Meneghetti, Massimo, Moscardini, Lauro, Yoshida, Naoki, Baccigalupi, Carlo, ...
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 constant scenario with a...
Testing the reliability of weak lensing cluster detections (2007)
Pace, Francesco, Maturi, Matteo, Meneghetti, Massimo, Bartelmann, Matthias, Moscardini, Lauro, Dolag, Klaus
We study the reliability of dark-matter halo detections with three different linear filters applied to weak-lensing data. We use ray-tracing in the multiple lens-plane approximation through a large...
Arc sensitivity to cluster ellipticity, asymmetries and substructures (2006)
Meneghetti, Massimo, Argazzi, Rodolfo, Pace, Francesco, Moscardini, Lauro, Dolag, Klaus, Bartelmann, Matthias, ...
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 they influence the...
Mass Distributions of HST Galaxy Clusters from Gravitational Arcs (2005)
Comerford, Julia M., Meneghetti, Massimo, Bartelmann, Matthias, Schirmer, Mischa
Although N-body simulations of cosmic structure formation suggest that dark matter halos have density profiles shallower than isothermal at small radii and steeper at large radii, whether observed...
Horesh, Assaf, Ofek, Eran O., Maoz, Dan, Bartelmann, Matthias, Meneghetti, Massimo, Rix, Hans-Walter
We compare the statistical properties of giant gravitationally lensed arcs produced in matched simulated and observed cluster samples. The observed sample consists of 10 X-ray selected clusters at...
The impact of gas physics on strong cluster lensing (2005)
Puchwein, Ewald, Bartelmann, Matthias, Dolag, Klaus, Meneghetti, Massimo
Previous studies of strong gravitational lensing by galaxy clusters neglected the potential impact of the intracluster gas. Here, we compare simulations of strong cluster lensing including gas...
Evolution of dark-matter haloes in a variety of dark-energy cosmologies (2005)
Bartelmann, Matthias, Dolag, Klaus, Perrotta, Francesca, Baccigalupi, Carlo, Moscardini, Lauro, Meneghetti, Massimo, ...
Constraints on dark energy models from galaxy clusters with multiple arcs (2005)
Meneghetti, Massimo, Jain, Bhuvnesh, Bartelmann, Matthias, Dolag, Klaus
Strong lensing by cluster-sized halos in dark energy cosmologies (2005)
Meneghetti, Massimo, Bartelmann, Matthias, Dolag, Klaus, Perrotta, Francesca, Baccigalupi, Carlo, Moscardini, Lauro, ...
Constraints on dark energy from strong gravitational lensing by galaxy clusters (2005)
Meneghetti, Massimo, Baccigalupi, Carlo, Bartelmann, Matthias, Dolag, Klaus, Moscardini, Lauro, Perrotta, Francesca, ...
Horesh, Assaf, Ofek, Eran O., Maoz, Dan, Bartelmann, Matthias, Meneghetti, Massimo, Rix, Hans-Walter
We compare the statistical properties of giant gravitationally lensed arcs produced in matched simulated and observed cluster samples. The observed sample consists of 10 X-ray-selected clusters at...
Strong lensing by cluster-sized halos in dark energy cosmologies (2005)
Meneghetti, Massimo, Bartelmann, Matthias, Dolag, Klaus, Perrotta, Francesca, Baccigalupi, Carlo, Moscardini, Lauro, ...
Constraints on Dark Energy Models from Galaxy Clusters with Multiple Arcs (2004)
Meneghetti, Massimo, Jain, Bhuvnesh, Bartelmann, Matthias, Dolag, Klaus
We make an exploratory study of how well dark energy models can be constrained using lensed arcs at different redshifts behind cluster lenses. Arcs trace the critical curves of clusters, and the...
Strong lensing by cluster-sized haloes in dark-energy cosmologies (2004)
Meneghetti, Massimo, Bartelmann, Matthias, Dolag, Klaus, Moscardini, Lauro, Perrotta, Francesca, Baccigalupi, Carlo, ...
We study the efficiency of numerically simulated galaxy clusters for producing strong gravitational lensing events in different dark-energy cosmologies with constant and time-variable equation of...
Numerical study of halo concentrations in dark-energy cosmologies (2004)
Dolag, Klaus, Bartelmann, Matthias, Perrotta, Francesca, Baccigalupi, Carlo, Moscardini, Lauro, Meneghetti, Massimo, ...
We study the concentration parameters, their mass dependence and redshift evolution, of dark-matter halos in different dark-energy cosmologies with constant and time-variable equation of state, and...
Do arcs require flat halo cusps? (2003)
Bartelmann, Matthias, Meneghetti, Massimo
It was recently claimed that several galaxy clusters containing radial and tangential gravitational arcs and having a measured velocity-dispersion profile for the brightest cluster galaxy had to have...
The impact of cluster mergers on arc statistics (2003)
Torri, Elena, Meneghetti, Massimo, Bartelmann, Matthias, Moscardini, Lauro, Rasia, Elena, Tormen, Giuseppe
We study the impact of merger events on the strong lensing properties of galaxy clusters. Previous lensing simulations were not able to resolve dynamical time scales of cluster lenses, which arise on...
Numerical study of halo concentrations in dark-energy cosmologies (2003)
Dolag, Klaus, Bartelmann, Matthias, Perrotta, Francesca, Baccigalupi, Carlo, Moscardini, Lauro, Meneghetti, Massimo, ...
We study the concentration parameters, their mass dependence and redshift evolution, of dark-matter halos in different dark-energy cosmologies with constant and time-variable equation of state, and...
Arc statistics with realistic cluster models (2003)
Meneghetti, Massimo, Bartelmann, Matthias, Moscardini, Lauro, Rasia, Elena, Tormen, Giuseppe, Torri, Elena
Arc statistics is known to be a powerful cosmological tool. Numerical lensing simulations show that orders of magnitude differences in the number of {\em giant} arcs on the whole sky are expected in...
cD galaxy contribution to the strong lensing cross sections of galaxy clusters (2003)
Meneghetti, Massimo, Bartelmann, Matthias, Moscardini, Lauro
We perform ray-tracing simulations evaluating the effect of a cD galaxy on the strong lensing properties of five galaxy cluster halos obtained from N-body simulations. The cD galaxy is modelled using...
Cluster cross-sections for strong lensing: analytic and numerical lens models (2003)
Meneghetti, Massimo, Bartelmann, Matthias, Moscardini, Lauro
Arc statistics in cosmological models with dark energy (2003)
Bartelmann, Matthias, Meneghetti, Massimo, Perrotta, Francesca, Baccigalupi, Carlo, Moscardini, Lauro
We investigate how the probability of the formation of giant arcs in galaxy clusters is expected to change in cosmological models dominated by dark energy with an equation of state p=w rho c^2...
Arc Statistics in Cosmological Models with Dark Energy (2002)
Bartelmann, Matthias, Meneghetti, Massimo, Perrotta, Francesca, Baccigalupi, Carlo, Moscardini, Lauro
We investigate how the probability of the formation of giant arcs in galaxy clusters is expected to change in cosmological models dominated by dark energy with an equation of state p=w rho c^2...
Cluster cross sections for strong lensing: analytic and numerical lens models (2002)
Meneghetti, Massimo, Bartelmann, Matthias, Moscardini, Lauro
The statistics of gravitationally lensed arcs was recognised earlier as a potentially powerful cosmological probe. However, while fully numerical models find orders of magnitude difference between...
Constraining cosmological models using arc statistics in future SZ cluster surveys (2001)
Meneghetti, Massimo, Bartelmann, Matthias, Moscardini, Lauro
Upcoming wide-area surveys in the submillimetre regime will allow the construction of complete galaxy cluster samples through their thermal Sunyaev-Zel'dovich effect. We propose an analytic method to...
Giant cluster arcs as a constraint on the scattering cross-section of dark matter (2000)
Meneghetti, Massimo, Yoshida, Naoki, Bartelmann, Matthias, Moscardini, Lauro, Springel, Volker, Tormen, Giuseppe, ...
We carry out ray tracing through five high resolution simulations of a galaxy cluster to study how its ability to produce giant gravitationally lensed arcs is influenced by the collision...
Cluster galaxies: contribution to the arc statistics (2000)
Meneghetti, Massimo, Bolzonella, Micol, Bartelmann, Matthias, Moscardini, Lauro, Tormen, Giuseppe
We present the results of a set of numerical simulations aiming at evaluating the effects of cluster galaxies on the arc statistics. At this goal we use nine different galaxy clusters obtained from...
Effects of cluster galaxies on arc statistics (1999)
Meneghetti, Massimo, Bolzonella, Micol, Bartelmann, Matthias, Moscardini, Lauro, Tormen, Giuseppe
We present the results of a set of numerical simulations evaluating the effect of cluster galaxies on arc statistics. We perform a first set of gravitational lensing simulations using three...