The Distribution of Stars in the Disk and Halo of the Galaxy
Globular clusters are a classical probe of the spatial distribution, kinematics, and metallicities in the halo of our Galaxy, but this approach is limited by the finite number of clusters. Surveys of nearby field stars with extreme kinematics or extreme metallicities can also contribute to the study of disk versus halo stars, but in this case the interpretation is difficult because of selection effects. Surveys of faint stars in situ at large distances show great promise for studies of the structure and evolution of our Milky Way Galaxy, because they can be designed to avoid most selection effects.
KeywordsVelocity Dispersion Globular Cluster Proper Motion Thin Disk Thick Disk
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