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23 papers · 1 filter
Optical Substructures in 48 Galaxy Clusters
M. Girardi, E. Escalera, D. Fadda +3
We analyze the presence of substructures in a set of 48 galaxy clusters, by using galaxy positions and redshifts. We use a multi-scale analysis which couples kinematical estimators…
General Relativity in terms of Dirac Eigenvalues
Giovanni Landi, Carlo Rovelli
The eigenvalues of the Dirac operator on a curved spacetime are diffeomorphism-invariant functions of the geometry. They form an infinite set of ``observables'' for general relativ…
On Dwarf Galaxies as the Source of Intracluster Gas
Brad K. Gibson, Francesca Matteucci
Recent observational evidence for steep dwarf galaxy luminosity functions in several rich clusters has led to speculation that their precursors may be the source of the majority of…
The Enrichment of the Intracluster Medium
Brad K. Gibson, Francesca Matteucci
The enrichment of the intracluster medium (ICM) of galaxy clusters, within the framework of the supernovae-driven wind model for elliptical galaxies, has been considered under two…
Constraints on Z' from W^+W^- production at the NLC with polarized beams
A. A. Pankov, N. Paver
We discuss the potential of NLC500 and NLC1000 to probe Z-Z' mixing and mass by the reaction e^+e^- -> W^+W^- with longitudinally polarized electrons. We perform a model-independen…
A Simplified Approach to Optimally Controlled Quantum Dynamics
Jair Botina, Herschel Rabitz, Naseem Rahman
A new formalism for the optimal control of quantum mechanical physical observables is presented. This approach is based on an analogous classical control technique reported previou…