Angular Momentum in Dwarf Galaxies

A. Del Popolo 1 , 2
  • 1 Dipartimento di Fisica e Astronomia, University Of Catania, Viale Andrea Doria 6, 95125 Catania, Italy
  • 2 International Institute of Physics, Universidade Federal do Rio Grande do Norte, 59012-970 Natal, Brazil

Abstract

We study the “angular momentum catastrophe” in the framework of interaction among baryons and dark matter through dynamical friction. By means of model we simulate 14 galaxies similar to those investigated by , and calculate the distribution of their spin parameters and the angular momenta. Our model gives the angular momentum distribution which is in agreement with the van den Bosch et al. observations. Our result shows that the “angular momentum catastrophe” can be naturally solved in a model that takes into account the baryonic physics and the exchange of energy and angular momentum between the baryonic clumps and dark matter through dynamical friction.

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