2004/11/09 by James Binney, Binney, James
Earth and Planetary Sciences · Physics and Astronomy · #Geophysics and Gravity Measurements #Oceanographic and Atmospheric Processes #Scientific Research and Discoveries #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0411229
7 pages to appear in The Three Dimensional Universe with GAIA, eds M. Perryman & C. Turon
arxiv created 2004/11/09 · arxiv updated 2009/12/01
Techniques for the construction of dynamical Galaxy models should be considered essential infrastructure that should be put in place before GAIA flies. Three possible modelling techniques are discussed. Although one of these seems to have significantly more potential than the other two, at this stage work should be done on all three. A major effort is needed to decide how to make a model consistent with a catalogue such as that which GAIA will produce. Given the complexity of the problem, it is argued that a hierarchy of models should be constructed, of ever increasing complexity and quality of fit to the data. The potential that resonances and tidal streams have to indicate how a model should be refined is briefly discussed.