This is a joint project between many participants, centred around mock data from Douglas Heggie’s N-body simulation of M4. The idea is to fit the M4 mock data with various mass modelling techniques and compare the results obtained with these different methods.
Some preliminary results from GCIII are shown here
The current plan is to turn this M4 challenge into one ‘Gaia Challenge' paper (coordinated by Vincent), with contributions from the following people/methods (others welcome too):
The plan is to use combined datasets with increasing level of information:
Mock data for steps 1 and 2 are currently available. For step 3, Elena Pancino is working on producing Gaia-like observations of the M4 snapshot (with different simulated backgrounds).
We want to compare how well the different methods recover or fit the following quantities/observables:
You can put your results and any interesting plots/ideas here.