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Abstract
We present an innovative approach to the methodology of dynamical modelling, allowing practical reconstruction of the underlying dark matter mass without assuming both the density and anisotropy functions. With this, the mass-anisotropy degeneracy is reduced to simple model inference, incorporating the uncertainties inherent with observational data, statistically circumventing the mass-anisotropy degeneracy in spherical collisionless systems. We also tackle the inadequacy that the Jeans method of moments has on small data sets, with the aid of Generative Adversarial Networks: we leverage the power of artificial intelligence to reconstruct the projected line-of-sight velocity distribution non-parametrically. We show, with realistic numerical simulations of dwarf spheroidal galaxies, that we can distinguish between competing dark matter distributions and recover the anisotropy and mass profile of the system.
Original language | English |
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Pages (from-to) | 3356-3372 |
Number of pages | 17 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 482 |
Issue number | 3 |
DOIs | |
Publication status | Published - 21 Jan 2019 |
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Dive into the research topics of 'Reliable mass calculation in spherical gravitating systems'. Together they form a unique fingerprint.Projects
- 1 Finished
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The Orbits and Interactions of Satellite Galaxies: A Fundamental Test of Cosmology
Power, C. (Investigator 01), Knebe, A. (Investigator 02), Lewis, G. (Investigator 03), Robotham, A. (Investigator 04), Obreschkow, D. (Investigator 05) & Zucker, D. (Investigator 06)
ARC Australian Research Council
1/01/14 → 30/09/17
Project: Research