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172 papers · 1 filter
On an extragalactic origin of the dominant part of the hadronic cosmic rays
R. Plaga
The possibility that the major part of all extrasolar hadronic cosmic rays with energies above 10 MeV/n is of extragalactic origin is discussed. Recent observational results on the…
Cluster Radio Relics as a Tracer of Shock Waves of the Large-Scale Structure Formation
Torsten A. Ensslin, Peter L. Biermann, Ulrich Klein +1
We present evidence for the existence of shock waves caused by the formation of the large-scale structure. In some clusters of galaxies peripherally located sources of extended dif…
Notes on affine isometric actions of discrete groups
Yurii A. Neretin
Consider a lattice in a group , $SL_2(\Q_p)$. We discuss actions of by affine isometric transformations of Hilbert spaces. We show that for…
Survival of Substructure within Dark Matter Haloes
Giuseppe Tormen, Antonaldo Diaferio, David Syer
Using high resolution cosmological N-body simulations, we investigate the survival of dark matter satellites falling into larger haloes. Satellites preserve their identity for some…
Dynamical Evolution of Boson Stars II: Excited States and Self-Interacting Fields
Jayashree Balakrishna, Edward Seidel, Wai-Mo Suen
The dynamical evolution of self-gravitating scalar field configurations in numerical relativity is studied. The previous analysis on ground state boson stars of non-interacting fie…
New Coordinate Systems for Axisymmetric Black Hole Collisions
P. Anninos, S. R. Brandt, P. Walker
We describe a grid generation procedure designed to construct new classes of orthogonal coordinate systems for binary black hole spacetimes. The computed coordinates offer an alter…