High Excitation Molecular Gas in the Magellanic Clouds

Details High Excitation Molecular Gas in the Magellanic Clouds High Excitation Molecular Gas in the Magellanic Clouds

2005-06-23

arxiv.org/abs/astro-ph/0506572v1

Astrophys.J.633:210-217,2005

Astronomy and Astrophysics

Astrophysics

18 pages, 3 figures, 5 tables. To appear in ApJ

Scientific paper

10.1086/432928

We present the first survey of submillimeter CO 4-3 emission in the Magellanic Clouds. The survey is comprised of 15 6'x6' maps obtained using the AST/RO telescope toward the molecular peaks of the Large and Small Magellanic Clouds. We have used these data to constrain the physical conditions in these objects, in particular their molecular gas density and temperature. We find that there are significant amounts of molecular gas associated with most of these molecular peaks, and that high molecular gas temperatures are pervasive throughout our sample. We discuss whether this may be due to the low metallicities and the associated dearth of gas coolants in the Clouds, and conclude that the present sample is insufficient to assert this effect.

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