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Paper: The Rotation Curves of Dwarf Galaxies: a Problem for Cold Dark Matter?
Volume: 327, Satellites and Tidal Streams
Page: 3
Authors: Klypin, A.; Rhee, G.; Valenzuela, O.; Holtzman, J.; Moorthy, B.
Abstract: We present the results of a study of stellar galactic disks rotating in cosmologically motivated cuspy dark matter halos. We “observe” our numerical models using the same tools as real observers do. We find different systematic effects that limit the accuracy with which density profiles can be derived from galaxy rotation curves. We find that projection effects due to the inclination of the galaxy as well as the presence of a small bulge or bar can significantly affect rotation curve measurements. If one ignores these effects, one may reach the false conclusion that the density profiles of dark matter halos are flat in the central parts.
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