First Detection of 492 GHz [C i] Emission from the Large Magellanic Cloud

Astronomy and Astrophysics – Astronomy

Scientific paper

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Galaxies: Ism, Ism: Atoms, Ism: Individual Alphanumeric: N159, Ism: Individual Name: 30 Doradus, Galaxies: Magellanic Clouds, Radio Lines: Ism

Scientific paper

The 3P1 --> 3P0 fine-structure transition of neutral atomic carbon [C I] was observed with the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO) toward two star-forming regions in the Large Magellanic Cloud: N159 and 30 Doradus. The [C I] line is weak in the vicinity of 30 Dor, a region with a uniquely hard and intense UV field. The I[C I]/ICO ratio in N159 is enhanced by a factor >~2 compared to the Milky Way Galaxy, a result attributable to the lower metallicity of the Large Magellanic Cloud.

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