Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...374l..33p&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 374, June 20, 1991, p. L33-L36.
Astronomy and Astrophysics
Astronomy
29
Emission Spectra, Galactic Nuclei, Infrared Sources (Astronomy), Milky Way Galaxy, Molecular Clouds, Fine Structure, Infrared Spectra, Interstellar Gas
Scientific paper
NASA's Kuiper Airborne Observatory has been used to conduct an extensive, velocity-resolved survey at 1-arcsec resolution of the 158-micron forbidden C II fine-structure line emission in the central 50 pc of the Galaxy. The emission is found to be strongest toward the rotating circumnuclear disk surrounding Sgr A West; a continuous bridge of the emission connects the Sgr A complex to the thermal radio filaments in the radio arc 10 arcmin north of the center. This suggests a direct physical connection. The brightest emission occurs preferentially near the edges of the massive Galactic center molecular clouds. It is concluded that these clouds are predominantly ionized by external UV photons.
Geis Norbert
Genzel Reinhard
Haggerty Michael
Jackson Jacque
Poglitsch Albrecht
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