1210.0806 (Edmond Giraud)

Producing baryons from neutralinos in small H2 clumps over cosmological ages    [PDF]

Edmond Giraud

Extreme scattering events in quasars suggest the existence of dark H2 clumps of mass $\rm \sim 10^{-3} sim M_\odot$ and size $\rm \sim 10 AU$. Such H2 clumps are extremely dense compared to WIMPs clumps of the same mass obtained by N-body simulations. A WIMP clump seeded by an H2 clump experiences a first infall during which its density increases by $\rm 10^6$ in $\rm \sim 1 Myr$. In this poster I begin to explore the phenomenology of mixed clumps made with H2 and WIMPs. Molecular clouds built with clumps are efficient machines to transform smooth distributions of WIMPs into concentrated networks. If WIMPs are neutralinos trapped in such moleular clouds, they may either enrich the baryon sector over cosmological ages, or remain mixed with cold H2 clouds until the clumps evaporate either by collision or by stellar UV heating. One of the main drawbacks of CDM profiles, their overly dense cores, is briefly revisited in this context.

View original: http://arxiv.org/abs/1210.0806