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Session 58 - Future of Antarctic Astrophysics.
Display session, Wednesday, June 10
Atlas Ballroom,

[58.06] AST/RO Observations of Atomic Carbon in the Galactic Center

R. Ojha, A. A. Stark, A. P. Lane, M. Rumitz, R. W. Wilson (Harvard Smithsonian CfA), R. A. Chamberlin (CSO), G. Wright (Lucent Tech.), T. M. Bania, A. D. Bolatto, M. Huang, J. G. Ingalls, J. M. Jackson (Boston U.)

A coarsely-sampled map of the region \vline l \vline < 2, \vline b \vline < 0.1 has been made in the 492 GHz ^3P_1 - ^3P_0 transition of [C I] with the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO). The distribution of [C I] emission is similar on the large scale to that of CO. Systematic differences between [C I] and CO emissivities in Galactic Center clouds are described as a function of cloud properties and environment. On average, the C/^12CO ratio is lower in the Galactic Center region than in the outer galactic disk. This difference can be attributed in part to optical depth effects, as shown by the C/^13CO ratio, and in part to the existence in the Galactic Center region of molecular and dense atomic gas not bound into clouds.

This research was supported in part by the National Science Foundation under a cooperative agreement with the Center for Astrophysical Research in Antarctica (CARA), grant number NSF OPP 89-20223. CARA is a National Science Foundation Science and Technology Center.

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