Angular Momentum in Dwarf Galaxies

Baltic astronomy

article

A. Del Popolo¹ 

[1] Dipartimento di Fisica e Astronomia, University Of Catania;International Institute of Physics, Universidade Federal do Rio Grande do Norte

关键词: cosmology theory;    large scale structure of Universe;    galaxies formation;   

DOI  :  10.1515/astro-2017-0176

来源: Institute of Theoretical Physics and Astronomy

【 摘 要 】

We study the “angular momentum catastrophe” in the framework of interaction among baryons and dark matter through dynamical friction. By means of Del Popolo (2009) model we simulate 14 galaxies similar to those investigated by van den Bosch, Burkert and Swaters (2001), 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.

【 授权许可】

Unknown