A multitransition CO study in the 30 Doradus complex in the Large Magellanic Cloud

作者：Kim S^*

来源：Publications of the Astronomical Society of the Pacific, 2006, 118(839): 94-97.

DOI：10.1086/498355

We have made a multitransition CO study of the largest H II complex, the 30 Doradus nebula, in the Large Magellanic Cloud (LMC). This is the most luminous example of a starburst region in the Local Group. We have searched for (CO)-C-12 J = 7 --> 6 emission toward the 30 Doradus complex with the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO), located at 2847 m altitude at the Amundsen-Scott South Pole Station. As a result, we have detected a (CO)-C-12 J = 7 --> 6 emitting cloud near the 30 Doradus complex. The (CO)-C-12 J = 7 --> 6/(CO)-C-12 J = 4 --> 3 line temperature ratio in this region is approximately a factor of 2 higher than that observed near the Sgr B2 complex. A radiative transfer calculation using the line ratios shows that the core of massive star formation in the LMC is much warmer and denser than that of the Milky Way.

• 出版日期2006-1