Investigating Star Formation Criteria on Local Scales

Details Investigating Star Formation Criteria on Local Scales Investigating Star Formation Criteria on Local Scales

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999noao.prop..374s&link_type=abstract

NOAO Proposal ID #1999A-0374

Computer Science

Scientific paper

Molecular gas is a pivotal component in galaxy evolution in its role as the fundamental fuel for star formation. Although star formation and the gas surface density are correlated on global scales, the relationship breaks down on local scales. What are the real criteria for star formation? To search for the true star formation criteria, we request optical and NIR (BRH(alpha)IJK) imaging of 12 galaxies for combination with an ongoing high resolution (~ 300 pc) CO survey. In addition to the CO images, we will use optical-NIR and NIR-NIR colors to map the dust which will provide an independent tracer of the molecular gas morphology. The CO distributions are extraordinarily complex in these galaxies. By comparing the CO morphologies to the dust morphologies, we will be able to check whether the complexity is due to variations in the CO emissivity. The complex morphologies could also be explained by hidden bars or oval distortions which will be revealed using the NIR images.

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