Orbital parameters of infalling dark matter substructures
نویسندگان
چکیده
منابع مشابه
Orbital Parameters of Infalling Dark Matter Substructures
We present distributions of the orbital parameters of dark matter substructures at the time of merging into their host halo. Accurate knowledge of the orbits of dark matter substructures is a crucial input to studies which aim to assess the effects of the cluster environment on galaxies, the heating of galaxy disks and many other topics. Orbits are measured for satellites in a large number of N...
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In order to specify cosmologically motivated initial conditions for major galaxy mergers (mass ratios 6 4:1) that are supposed to explain the formation of elliptical galaxies we study the orbital parameters of major mergers of cold dark matter halos using a high-resolution cosmological simulation. Almost all encounters are nearly parabolic with eccentricities e ≈ 1 and no correlations between t...
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Upcoming γ-ray satellites will search for Dark Matter annihilations in Milky Way substructures (or ’clumps’). The prospects for detecting these objects strongly depend on the assumptions made on the distribution of Dark Matter in substructures, and on the distribution of substructures in the Milky Way halo. By adopting extreme prescriptions for these quantities, we bracket the number of sources...
متن کاملSubstructures in Cold Dark Matter Halos
We analyse the properties of substructures within dark matter halos (subhalos) using a set of high-resolution numerical simulations of the formation of structure in a ΛCDM Universe. Our simulation set includes 11 high-resolution simulations of massive clusters as well as a region of mean density, allowing us to study the spatial and mass distribution of substructures down to a mass resolution l...
متن کاملThe phase-space distribution of infalling dark matter subhalos
We use high-resolution numerical simulations to study the physical properties of subhalos when they merge into their host halos. An improved algorithm is used to identify the subhalos. We then examine their spatial and velocity distributions in spherical and triaxial halo models. We find that the massive subhalos are more preferentially accreted along the major axis of the host halo than the lo...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2005
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2005.08788.x