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Small-scale Substructure in Dark Matter Haloes: Where Does Galaxy Formation Come to an End?
James E. Taylor, Joseph Silk, Arif Babul
Models of structure formation based on cold dark matter predict that most of the small dark matter haloes that first formed at high redshift would have merged into larger systems b…
Can Supersymmetry Naturally Explain the Positron Excess?
Dan Hooper, James E. Taylor, Joseph Silk
It has often been suggested that the cosmic positron excess observed by the HEAT experiment could be the consequence of supersymmetric dark matter annihilating in the galactic halo…
Light and Heavy Dark Matter Particles
C. Boehm, P. Fayet, J. Silk
It has recently been pointed out that the 511 keV emission line detected by Integral/SPI from the bulge of our galaxy could be explained by annihilations of light Dark Matter parti…
Searching For Dark Matter with Neutrino Telescopes
Dan Hooper, Joseph Silk
One of the most interesting mysteries of astrophysics is the puzzle of dark matter. Although numerous techniques have been explored and developed to detect this elusive substance,…
Isocurvature Fluctuations Induce Early Star Formation
Naoshi Sugiyama, Saleem Zaroubi, Joseph Silk
The early reionisation of the Universe inferred from the WMAP polarisation results, if confirmed, poses a problem for the hypothesis that scale-invariant adiabatic density fluctuat…
MeV Dark Matter: Has It Been Detected?
Celine Boehm, Dan Hooper, Joseph Silk +1
We discuss the possibility that the recent detection of 511 keV gamma-rays from the galactic bulge, as observed by INTEGRAL, is a consequence of low mass (~MeV) particle dark matte…