Assigned ID: 622 ----- Attempting Submission 1 (Fri Jan 26 16:15:29 PST 2007) ----- We propose to investigate gas dynamical environments around star forming regions in the ground-design spiral galaxy M51. The archival HST/ACS Halpha image will reveal the location and properties (e.g. size, luminosity) of HII regions. The CARMA key project observes molecular gas over the entire M51 disk, overlaying the gas density and velocity structures on the HII image. CARMA has sufficient spatial and velocity resolutions for revealing dynamical environments (e.g. shocks, shears) around individual star forming regions. We will correlate the HII region properties with their dynamical environments. The comparison of CARMA and HST image will reveal the previously unseen connection between galactic gas dynamics and the trigger of star formation.

ISM IN EXTERNAL GALAXIES 12 59000 false 0.0 false false false false false false SUPPORTED