Abstract
We have made 55″ resolution maps of the 158 µm [CII] emission line in the region of the curved, thermal filaments and the +20/+50 kms-1 molecular clouds in Sgr A. The [CII] emission is spatially well correlated with the radio continuum in the filaments. The large intensity of the [CII] radiation excludes shocks as the origin of the ionization and we conclude that the curved filaments are most likely photo-ionized HII regions at the surface of dense molecular clouds. Our [CII] maps of the +20/+50 kms-1 clouds indicate that the +50 kms-1cloud is close to (<10pc) Sgr A west while the more massive +20 kms-1 cloud is at a greater distance from the center (>30pc).
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Genzel, R., Stacey, G.J., Townes, C.H., Poglitsch, A., Geis, N. (1989). 158µm [CII] Mapping of the Galactic Center Molecular Clouds. In: Morris, M. (eds) The Center of the Galaxy. International Astronomical Union Union Astronomique Internationale, vol 136. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2362-1_18
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DOI: https://doi.org/10.1007/978-94-009-2362-1_18
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