Found 12 talks width keyword numerical simulations

Wednesday November 11, 2009
Max-Planck Institut für Sonnensystemforschung, Germany


The dynamics of the solar atmosphere is largely controlled by its magnetic coupling to the photosphere of the Sun. Since the solar magnetic field is complex, numerical simulation must be utilized to investigate the coupling processes. Results will be shown of treating this way the two unresolved issues - the heating of the corona and the acceleration of the solar wind.

Thursday November 13, 2008
Max-Planck Institut für Astrophysik, Garching, Germany


In our now-standard picture for the growth of structure, dark matter halos are the basic unit of nonlinear structure in the present Universe. I will report results from simulations of galaxy-scale dark halos with more than an order of magnitude better mass resolution than any previously published work. Tests demonstrate detailed convergence for (sub)structures well below a millionth the mass of the final system. Even with such resolution the fraction of halo mass in bound subhalos does not rise above a few percent within the half-mass radius. I will also present a new simulation technique which allows structure in the dark matter distribution to be studied on very much smaller scales. This is required for accurate forecasts of the expected signal both in earth-bound experiments designed to detect dark matter directly, and in indirect detection experiments like GLAST which attempt to image dark matter annihilation radiation at gamma-ray wavelengths.

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