Treasury Imaging of Star Forming Regions in the Local Group: Complementing the GALEX and NOAO Surveys

Details Treasury Imaging of Star Forming Regions in the Local Group: Complementing the GALEX and NOAO Surveys Treasury Imaging of Star Forming Regions in the Local Group: Complementing the GALEX and NOAO Surveys

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006hst..prop11079b&link_type=abstract

HST Proposal ID #11079. Cycle 15

Computer Science

Scientific paper

We propose to use WFPC2 to image the most interesting star-forming regions in the Local Group galaxies, to resolve their young stellar populations. We will use a set of filters including F170W, which is critical to detect and characterize the most massive stars, to whose hot temperatures colors at longer wavelengths are not sensitive. WFPC2's field of view ideally matches the typical size of the star-forming regions, and its spatial resolution allows us to measure indvidual stars, given the proximity of these galaxies. The resulting H-R diagrams will enable studies of star-formation properties in these regions, which cover largely differing metallicities a factor of 17, compared to the factor of 4 explored so far and characteristics. The results will further our understanding of the star-formation process, of the interplay between massive stars and environment, the properties of dust, and will provide the key to interpret integrated measurements of star-formation indicators UV, IR, Halpha available for several hundreds more distant galaxies. Our recent deep surveys of these galaxies with GALEX FUV, NUV and ground-based imaging UBVRI, Halpha, [OIII] and [SII] provided the identification of the most relevant SF sites. In addition to our scientific analysis, we will provide catalogs of HST photometry in 6 bands, matched corollary ground-based data, and UV, Halpha and IR integrated measurements of the associations, for comparison of integrated star-formation indices to the resolved populations. We envisage an EPO component.

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