2006PASP..118...94K

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 ¹²CO 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 ¹²CO J=7⟶6 emitting cloud near the 30 Doradus complex. The ¹²CO J=7⟶6/¹²CO 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.