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CO Along the Line of Sight to Galactic Center Infrared Sources

Published online by Cambridge University Press:  23 September 2016

T. R. Geballe
T. R. Geballe*
Affiliation:
Joint Astronomy Centre 665 Komohana Street Hilo, Hawaii 96720 U. S. A.

Abstract

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High resolution spectra of the 4.64 micron 1–0 R2 line of CO toward infrared sources in the galactic center reveal absorption components identified with features in radio and millimeter wave spectra of molecular lines. They demonstrate that the +20 km/s cloud is situated in front of the Sgr A West and the +50 km/s cloud is behind it. The spectra of IRS 3 and IRS 7 have strong absorptions near +50 km/s, which may originate in the 2 pc radius circumnuclear ring; if so then the western side of the ring lies in front of the galactic center. A less likely interpretation is that these objects, which are only a few arc-seconds from IRS 16, are behind the +50 km/s cloud and, thus, well behind the galactic center.

Type
Sagittarius A West and the Circumnuclear Disk
Information
Symposium - International Astronomical Union , Volume 136: The Galactic Center , 1989 , pp. 469 - 471
Copyright
Copyright © Kluwer 1989 

References

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