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CO (J=2-1) Observations of the Molecular Cloud Complex in the Galactic Center

Published online by Cambridge University Press:  12 April 2016

Tomoharu Oka ,
Tetsuo Hasegawa ,
Masahiko Hayashi ,
Toshihiro Handa  and
Sei'ichi Sakamoto
Tomoharu Oka
Affiliation:
Department of Astronomy, Faculty of Sience, University of Tokyo, Bunkyo, Tokyo 113, Japan
Tetsuo Hasegawa
Affiliation:
Institute of Astronomy, Faculty of Sience, University of Tokyo, Mitaka, Tokyo 181, Japan
Masahiko Hayashi
Affiliation:
Department of Astronomy, Faculty of Sience, University of Tokyo, Bunkyo, Tokyo 113, Japan
Toshihiro Handa
Affiliation:
Institute of Astronomy, Faculty of Sience, University of Tokyo, Mitaka, Tokyo 181, Japan
Sei'ichi Sakamoto
Affiliation:
Department of Astronomy, Faculty of Sience, University of Tokyo, Bunkyo, Tokyo 113, Japan

Abstract

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We report a large scale mapping observation of the Galactic center region in the CO (J=2-1) line using the Tokyo-NRO 60cm survey telescope. Distribution of the CO (J=2-1) emission in the I-V plane suggests that molecular clouds forms a huge complex (Nuclear Molecular cloud Complex, NMC). Tracers of star formation activities in the last 106-108 years show that star formation has occured in a ring ~ 100 pc in radius. Relative to this Star Forming Ring, the molecular gas is distributed mainly on the positive longitude side. This may indicate that much of the gas in NMC is in transient orbit to fall into the star forming ring or to the nucleus in the near future.

Type
3. Astronomical Results and Prospects
Information
International Astronomical Union Colloquium , Volume 140: Astronomy with Millimeter and Submillimeter Wave Interferometry , 1994 , pp. 168 - 169
Copyright
Copyright © Astronomical Society of the Pacific 1994

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