Models for the Formation of spherical and toroidal Structures of Cold Dark Matter in the Milky Way Export

@article{citeulike:4628486, abstract = {Context. An accumulation of Cold Dark Matter in the vicinity of the galactic plane of the Milky Way has been observed. Aims. We determine necessary conditions for the observed accumulation. Methods. We establish models for the steps of the process of the infall of a dwarf galaxy. These describe the formation of a spiral orbit due to dynamical friction, the tidal disruption of the dwarf and the interaction of the resulting tidal stream with the galactic disk. Results. The tidal stream is gravitationally stable. For the described steps of infall we determine duration times and necessary cross sections for the interaction of Cold Dark Matter particles with particles in the galactic disk. For typical cross sections of strong and weak interactions, the duration of the process of accumulation of Cold Dark Matter in the galactic disk exceeds the age of the universe. Conclusions. The above-mentioned necessary cross section is larger than the cross sections typical for either weak or strong interaction.}, archivePrefix = {arXiv}, author = {Carmesin, Hans-Otto and Errani, Rapha\&\#xeb;l}, citeulike-article-id = {4628486}, citeulike-linkout-0 = {http://arxiv.org/abs/0810.5300v1}, citeulike-linkout-1 = {http://arxiv.org/pdf/0810.5300v1}, day = {24}, eprint = {0810.5300v1}, keywords = {and, cold, dark, for, formation, in, matter, milky, models, of, spherical, structures, the, toroidal, way}, month = {May}, posted-at = {2009-05-25 11:06:22}, priority = {2}, title = {Models for the Formation of spherical and toroidal Structures of Cold Dark Matter in the Milky Way}, url = {http://arxiv.org/abs/0810.5300v1}, year = {2009} }

TY - JOUR ID - citeulike:4628486 L3 - citeulike-article-id:4628486 N2 - Context. An accumulation of Cold Dark Matter in the vicinity of the galactic plane of the Milky Way has been observed. Aims. We determine necessary conditions for the observed accumulation. Methods. We establish models for the steps of the process of the infall of a dwarf galaxy. These describe the formation of a spiral orbit due to dynamical friction, the tidal disruption of the dwarf and the interaction of the resulting tidal stream with the galactic disk. Results. The tidal stream is gravitationally stable. For the described steps of infall we determine duration times and necessary cross sections for the interaction of Cold Dark Matter particles with particles in the galactic disk. For typical cross sections of strong and weak interactions, the duration of the process of accumulation of Cold Dark Matter in the galactic disk exceeds the age of the universe. Conclusions. The above-mentioned necessary cross section is larger than the cross sections typical for either weak or strong interaction. TI - Models for the Formation of spherical and toroidal Structures of Cold Dark Matter in the Milky Way KW - and KW - cold KW - dark KW - for KW - formation KW - in KW - matter KW - milky KW - models KW - of KW - spherical KW - structures KW - the KW - toroidal KW - way AU - Carmesin, Hans-Otto AU - Errani, Raphaël PY - 2009/May/24/ UR - http://arxiv.org/abs/0810.5300v1 ER -