Other
Scientific paper
Jun 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jkas...38..253s&link_type=abstract
Journal of the Korean Astronomical Society, vol. 38, no. 2, pp. 253-256
Other
Submillimeter-Wave Telescope, Ism: Molecules, Ism: Atoms, Submillimeter [Ci] Lines
Scientific paper
We have constructed the Mount Fuji submillimeter-wave telescope at Nishiyasugawara (alt. 3725 m) near the summit of Mt. Fuji (alt. 3774 m). Thanks to the excellent condition of Mt. Fuji, we have successfully carried out the [CI] survey toward more than 40 square degrees of sky, including Orion MC, Taurus MC, Rosetta MC, DR 15, DR 21, NGC 1333, NGC 2264, W 3, W 44, W 51, L 134, ρ-Oph. Our [CI] survey have revealed that the [CI] 492 GHz emission widely extends to the molecular clouds. The spatial and velocity structures of the [CI] 492 GHz emission resemble those of 13CO J=1--0 in many molecular clouds, implying that [CI] 492 GHz and 13CO J=1--0 are emitted from the same gas. The column density of C^0 linearly correlates with that of CO up to high A_V, suggesting that C^0 exist in the deep interior of molecular clouds. In several regions, we have found that the distributions of C^0 and CO are different from each other. The C^0-rich area is found in the Hieles' cloud 2. The C^+/CO/C^0 configuration is found in DR 15, ρ-Oph, M 17, Orion KL, and NGC 1333. These results indicate that an origin of C^0 is unrelated with the photodissociation process. We discuss the observed C^0 distributions in relation to the non-equilibrium chemistry.
Sakai Takeshi
Yamamoto Satoshi
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