(1) What quality of data are required to determine the mass profile? (2) How can we best break the degeneracy between velocity anisotropy and mass? (3) How badly do we do if we assume spherical symmetry but the galaxy is actually triaxial?
Key working group coordinator: Justin Read
Summary of 2015 Gaia Challenge: Summary GCIII
The default mocks are designed to cover the following tests:
We realise that the above mocks about to a very large number of tests which for some methods may be prohibitive. For this reason, if you can only run some of the tests the priority order is as follows:
In all cases projections should be along the z-axis.
Example: Units: kpc, Msun, km/s File format: ASCII columnated (headings allowed). Example:
|Projected/or 3D radius (kpc)||Cumulative mass (Msun) [2.3% low]||[15.9% low]||Median [50%]||[84.1% high]||[97.7% high]|
If using the triaxial test data, please cite the Gaia Challenge wiki and http://adsabs.harvard.edu/abs/2009MNRAS.395.1079D, as the data for this test were generated using the Made-to-Measure (M2M) N-body code from Dehnen 2009. For further details of our publication policy see publications.
Results from running the above using a variety of techniques can be found here.
Questions on outputs
Questions on comparisons of methods
Can we still bring in new methods to this 3rd GAIA Challenge?