Jun 23 – 28, 2014
Europe/Zurich timezone

Probing dark matter in dwarf galaxies with non-parametric mass models

Jun 26, 2014, 5:10 PM
Room 5 (Tuschinski Theatre)

Room 5

Tuschinski Theatre

Presentation Dark Matter: Cosmological Aspects Dark Matter: Cosmological Aspects


Pascal Steger (E)


We propose a new non-parametric method to determine the mass distribution in spherical systems. A high dimensional parameter space encoding tracer density, line of sight velocity anisotropy and total mass density is sampled using MultiNest. Without assumptions on the functional form of any of these profiles, we can reproduce reliably the total mass density and velocity anisotropy profile of mock dwarf galaxies. We show applications to observed dwarf galaxies, and point out what data quality is required to measure the central density profile.


A new non-parametric mass modelling method for spherical systems is verified with mock data, and applied to dwarf spheroidal galaxies.

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