Other
Scientific paper
Jul 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9490k&link_type=abstract
HST Proposal ID #9490
Other
Hst Proposal Id #9490
Scientific paper
Given our location in the disk of the Milky Way, it is often difficult to catalogue a complete population of objects in the Galaxy due to obscuration. M101 is the closest face-on Milky Way analogue and thus is the best system for studying stellar populations similar to those of the Milky Way. We propose a multi-purpose mosaic of ACS observations of M101 that will allow us to complete two major goals. 1} We will identify optical counterparts of M101's population of X-ray sources, resolving the mystery of M101's curious X-ray population and increasing the number of known High Mass X-ray Binaries {HMXB} to the point that statistical studies of those objects will be useful. 2} We will identify globular clusters in M101 and measure the luminosity and metallicity distribution of the M101 globular cluster system, which has not been previously studied. These measurements will improve our understanding of the variation in globular cluster populations as a function of galaxy type, and provide an important study of a spiral galaxy's globular cluster system for use in constraining galaxy formation/merger models. Given M101's closeness, an optical map of a substantial portion of the disk, when combined with high resolution data at other energies, will allow M101 to play a key role in further studies of galactic structure.
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