Results of the ESO / SEST Key Programme - Co/ in the Magellanic Clouds - Part Two - Co/ in the Southwest Region of the Small Magellanic Cloud

Details Results of the ESO / SEST Key Programme - Co/ in the Magellanic Clouds - Part Two - Co/ in the Southwest Region of the Small Magellanic Cloud Results of the ESO / SEST Key Programme - Co/ in the Magellanic Clouds - Part Two - Co/ in the Southwest Region of the Small Magellanic Cloud

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...271....1r&link_type=abstract

Astronomy and Astrophysics, Vol.271, NO. 1/APRI, P. 1, 1993

Astronomy and Astrophysics

Astrophysics

64

Scientific paper

We present the results of fully-sampled observations of the ^12^CO(1-0) line in the SW "Bar" region of the Small Magellanic Cloud (SMC), made with the SEST telescope at 45" resolution. Previously, this line had only been observed in the SMC at the resolution of 8.8' (Rubio et al. 1991). We have also observed the ^12^CO(2-1), ^13^CO(1-0) and ^13^CO(2-1) lines at a number of positions. In this region of the SMC we have detected CO only in the lower-velocity (i.e. nearer) component of this galaxy. The main CO features correspond to dark clouds seen optically; some are associated with H II regions and with far-infrared sources. The spatial and velocity distribution of CO is complex with structures on all scales and large-scale velocity gradients. This is an intrinsic property of the observed clouds: it is not due to confusion along the line of sight. For two resolved CO clouds associated with H II regions comparable to the Orion nebula, all four CO lines have been observed at a similar angular resolution. The ^12^CO(1-0)/^13^CO(1-0) line intensity ratios are between 10 and 16, the ^12^CO(2-1)/^12^CO(1-0) are slightly larger than 1 and the ^13^CO(2-1)/^13^CO(1-0) even larger.

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