Not-so-Dark Matter: strategies for indirect detection and identification of Dark Matter

摘要: The existence of Dark Matter (DM) is supported by multiple evidences, achieved means very different experimental strategies. Its energy density today has been measured to account for almost a quarter the total in Universe. DM mainly sensible gravity and it interacts only weakly through nuclear electromagnetic interactions. Under assumption that DM particle its own anti-particle, annihilation products can be searched order obtain informations about distribution and, more generally, infer some properties. This idea beyond indirect detection. In this Ph.D. thesis I will focus on into gamma-rays discuss possibility obtaining clear signatures from analysis signals. Being flux proportional squared, natural targets searches are Galactic Center (due vicinity large amount DM) near dwarf spheroidal galaxies their mass-to-light ratio). Experimental data both these classes sources have not found any signal, being able provide upper limits flux. I present here two alternative strategies which may detected signal disentagled gamma-ray background. In first case effect Black Holes (BHs) producing overdensities. most efficent mechanism adiabatic contraction around SuperMassive Holes, create enhancements called spikes. However, scenario mini-spikes Intermediate Mass realistic prospects detecting our Galaxy Andromeda Galaxy. I move then angular power spectrum anistropies emission. After galactic foreground cosmic rays interacting with interstellar medium) subtructed map sky, residual isotropic background remains, Extra-galactic Cosmic Gamma-ray Background (EGB) EGRET. The Fermi LAT satellite soon precise measurement EGB predictions showing contribution presence EGB. Both extra-galactic substructures taken account, dominating at low multipoles. This based projects involved during my results already discussed those papers where am among authors.