Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasj...43l..27t&link_type=abstract
Astronomical Society of Japan, Publications (ISSN 0004-6264), vol. 43, no. 3, 1991, p. L27-L35.
Astronomy and Astrophysics
Astronomy
9
Continuous Radiation, Galactic Nuclei, H Ii Regions, Radio Astronomy, Galactic Structure, Milky Way Galaxy, Molecular Clouds, Radio Observation, Radio Sources (Astronomy)
Scientific paper
The 22.3-GHz continuum emission of the Sgr C complex was observed using the Nobeyama MIllimeter Array. It was found that the Sgr C complex has a U-shaped ridge comprasing several clumpy features as well as shell-like features. The spectral index of these features suggests optically thin thermal emission embedded in the nonthermal component. A barlike structure, noticed in a previous 1.7-GHz continuum observation, is already very weak at 22.3 GHz. The steep spectrum of this barlike structure is consistent with a nonthermal origin. The Sgr C complex is located at the end of the elongated molecular cloud in the Galactic center region. The close relations of morphology and velocity between the Sgr C complex and the molecular cloud suggest that the Sgr C complex is an H II region physically interacting with the molecular cloud in the Galactic center region.
Ishiguro Masato
Kobayashi Hideyuki
Murata Yasuhiro
Tsuboi Masato
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