Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 485, Issue 2, Pages 2546-2557Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stz573
Keywords
galaxies: haloes; galaxies: kinematics and dynamics; galaxies: structure
Categories
Funding
- European Union [690904]
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We reinvestigate the Fornax cusp-core problem using observational results on the spatial and mass distributions of globular clusters (GCs) in order to put constraints on the dark matter profile. We model Fornax using high-resolution N-body simulations with entirely live systems, i.e. self-gravitating systems composed of stars and dark matter, which account correctly for dynamical friction and tidal effects between Fornax and the GCs. We test two alternative hypotheses, which are a cored and a cuspy halo for Fornax by exploring a reasonable range of initial conditions on GCs. For Fornax cored dark matter halo, we derive a lower limit on the core size of r(c) greater than or similar to 0.5 kpc. Contrary to many previous works, we show also that for different initial conditions, a cuspy halo is not ruled out in our simulations based on observations of Fornax GCs.
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