The (very) small scale structure of DM halos

Simon White, MPA

Improving computers and simulation methods have made it possible to simulate dark halos like that of the Milky Way with more than a billion particles. Such simulations predict hundreds of thousands of substructures and an inner cusp extending to within 10pc of the centre. The resolution is nevertheless many orders of magnitude short of that needed to predict the signals expected in direct and indirect DM detection experiments. I will discuss new simulation techniques which allow the DM distribution to be explored down to metre scales and below, as required to address these issues.