Computer Science
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop.9934j&link_type=abstract
HST Proposal ID #9934
Computer Science
Hst Proposal Id #9934 Galaxies
Scientific paper
We will use multi-wavelength observations available in the HST archive to study the properties of ultra-young ``super star clusters'' as they emerge from their natal cocoons to become visible in optical light. These ultra-young {< 1 Myr} clusters have been recently discovered using radio and mid-IR observations, and they represent the youngest class of massive star clusters yet observed. However, the transition between the deeply embedded clusters to the optically visible clusters has not yet been studied. We have identified five starburst systems from our radio survey that are known to host ultra- young massive star clusters and have corresponding multi- wavelength data available in the HST archive spanning the optical and infrared regimes. In addition, several of these galaxies have narrow-band observations available, including H- alpha and Pa-alpha. By analyzing these data in concert with our radio data, we will be able to address the evolutionary stage at which SSCs become visible in the optical and/or near- IR regimes, whether there is any correlation between properties determined from radio observations {such as electron density} and optical characteristics {such as extinction}, and what fraction of recent star formation in these galaxies is optically obscured. These results will ultimately provide insight on the timescales involved in the earliest stages of SSC evolution and the properties of massive star formation throughout the universe. This proposal is complementary to the GO proposal entitled ``NICMOS Survey of Pre-Natal Super Star Clusters in Starbursts'' submitted by Johnson & Gallagher in this HST cycle.
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