CO Observations of Molecular Gas Around a Giant HII Region in M101.

Details CO Observations of Molecular Gas Around a Giant HII Region in M101. CO Observations of Molecular Gas Around a Giant HII Region in M101.

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.4501g&link_type=abstract

American Astronomical Society, 188th AAS Meeting, #45.01; Bulletin of the American Astronomical Society, Vol. 28, p.894

Astronomy and Astrophysics

Astronomy

Scientific paper

Using the James Clerk Maxwell Telescope, we observed two rotational transitions of CO (J=2->1 and J=3->2) toward NGC 5461---the brightest giant HII region in the M101 galaxy. With even higher resolution (a few arcseconds), we observed CO J=1->0 in NGC 5461 using the Owens Valley Millimeter Array. The higher resolution observations resolve the peak seen in the J=2->1 map to several smaller peaks. These giant molecular clouds have diameters up to 200 pc. Also, we have calculated the line ratio of (12) CO/(13) CO to be between 6.7 and 8.1, which agrees well with the ratios found in M33. Finally, we obtained a marginal detection of (13) CO J=2->1.

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