Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21348504k&link_type=abstract
American Astronomical Society, AAS Meeting #213, #485.04; Bulletin of the American Astronomical Society, Vol. 41, p.456
Astronomy and Astrophysics
Astronomy
2
Scientific paper
Our observations of M51 in CO(1-0) line with CARMA and Nobeyama 45m telescope has revealed a new picture of ISM evolution in galaxies, namely one driven by galaxy's global dynamics -- the most massive GMCs (Giant Molecular Associations - GMAs) are first assembled and then broken up as the gas flow through the spiral arms. The GMAs and their H2 molecules are not fully dissociated into atomic gas as predicted in stellar feedback scenarios, but are fragmented into smaller GMCs upon leaving the spiral arms. We have initiated a new survey of nearby galaxies in CO(1-0) line with CARMA and Nobeyama 45m telescope, probing the generality of the scenario of dynamically-driven ISM evolution. The sample is selected from that of the Spitzer SINGS survey, and comprises the most famous nearby galaxies with the full range of ancillary data; those data are crucial in our study of ISM evolution (CARMA, Nobeyama \& VLA) and star formation (Spitzer, GALEX \& Herschel). We will present initial results from this new CO survey.
Koda Jin
Nearby Galaxies CO Survey Group
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