On the isolated dwarf galaxies: from cuspy to flat dark matter density profiles and metallicity gradients

Autor:	Pasetto, S., Grebel, E. K., Berczik, P., Spurzem, R., Dehnen, W.
Rok vydání:	2010
Předmět:	Astrophysics - Cosmology and Nongalactic Astrophysics
Druh dokumentu:	Working Paper
DOI:	10.1051/0004-6361/200913240
Popis:	The chemodynamical evolution of spherical multi-component self-gravitating models for isolated dwarf galaxies is studied. We compare their evolution with and without feedback effects from star formation processes. We find that initially cuspy dark matter profiles flatten with time as a result of star formation, without any special tuning conditions. Thus the seemingly flattened profiles found in many dwarfs do not contradict the cuspy profiles predicted by cosmological models. We also calculate the chemical evolution of stars and gas, to permit comparisons with observational data. Comment: Accepted the 28/01/10
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1002.1085 Zobrazit plný text záznamu View this record from Arxiv