Jun 23 – 28, 2014
Europe/Zurich timezone

Self-consistent velocity distributions for local Dark Matter

Jun 23, 2014, 6:10 PM
Room 5 (Tuschinski Theatre)

Room 5

Tuschinski Theatre

Dark Matter Direct Detection Dark Matter: Direct Detection


Mattia Fornasa (U)


Dark Matter (DM) direct detection experiments usually assume a simple “Standard Halo Model” for the Milky Way halo, in which the velocity distribution f(v) is Maxwellian. In an alternative observation-oriented approach the DM velocity distribution is derived from our knowledge of the composition of the Milky Way (i.e. its mass model), obtaining, thus, a “self-consistent” f(v). This is possible under some specific assumptions, that normally include considering an isotropic velocity tensor (i.e. the so-called Eddington formalism). I extended this approach to anisotropic distributions, describing how it is possible to generate self-consistent solutions without the requirement of isotropy. I also studied the effect of having different angular-moment-dependent components of the DM phase-space density F(E,L) and, integrating over a complete sample, I determined which is the largest uncertainty on f(v) associated with our ignorance on the anisotropic part of F(E,L).

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