Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...430l..37m&link_type=abstract
The Astrophysical Journal, Part 2 - Letters, vol. 430, no. 1, p. L37-L40
Astronomy and Astrophysics
Astrophysics
63
Balloon-Borne Instruments, Carbon, Ionizing Radiation, Magellanic Clouds, Carbon Monoxide, Cosmic Dust, Molecular Clouds, Ultraviolet Absorption
Scientific paper
We have mapped the Large Magellanic Cloud (the LMC) in the (C II) 158 microns fine-structure line with the Balloon-borne Infrared Carbon Explorer (BICE) system. The (C II) line emission was detected over most of the LMC. The mean (C II)/CO (J = 1-0) line intensity ratio was 23,000 18 times larger than the typical value observed in the Galactic plane (1300). This result implies that each clump of the molecular clouds in the LMC has a larger C(+) envelope relative to its CO core than those in our Galaxy. Lower dust abundance due to its lower metallicity allows UV photons, which convert CO molecules into C(+) ions, to penetrate deeper into the clumps in the LMC than in our Galaxy.
Doi Yasuo
Low Frank J.
Mochizuki Kenji
Nakagawa Takao
Nishimura Tetsuo
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