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CO Mapping of the Inner Few Hundred Parsecs of the Galaxy

  • Conference paper
CO: Twenty-Five Years of Millimeter-Wave Spectroscopy

Part of the book series: International Astronomical Union / Union Astronomique Internationale ((IAUS,volume 170))

Abstract

We have made high resolution mapping observations of 12CO ( J=l−0) and 13CO ( J=l−0) from the central few hundred parsecs of the Galaxy using the NRO 45m telescope (HPBW=16″). The high resolution CO maps reveal many molecular arc and/or shell structures which could have resulted from interactions with supernovae. We also found a large (radius ∼ 50 pc) ring structure surrounding the region of diffuse X-ray emission, expanding at V EXP ≃ 200 km s−1. This and other evidence suggest that a galactic superwind following a burst of star formation in the recent past is sweeping up the ambient gas. The Galactic center may have experienced a burst of star formation ∼ 5 × 107 years ago, and it may be in post-starburst phase now.

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Author information

Authors and Affiliations

  1. Institute of Astronomy, Faculty of Science, University of Tokyo, Osawa 2-21-1, Mitaka, Tokyo, 181, Japan

    Tomoharu Oka, Tetsuo Hasegawa & Toshihiro Handa

  2. Department of Astronomy and Earth Sciences, Tokyo Gakugei University, Nukuikitamachi 4-1-1, Koganei, Tokyo, 184, Japan

    Fumio Sato

  3. Department of Physics, Faculty of Science, Ibaraki University, Bunkyo 2-1-1, Mito, Ibaraki, 310, Japan

    Masato Tsuboi

Authors
  1. Tomoharu Oka
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  2. Tetsuo Hasegawa
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  3. Toshihiro Handa
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  4. Fumio Sato
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  5. Masato Tsuboi
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Editor information

Editors and Affiliations

  1. NASA Ames Research Center, Moffett Field, CA, USA

    William B. Latter

  2. National Radio Astronomy Observatory, Tucson, AZ, USA

    Simon J. E. Radford , Philip R. Jewell  & Jeffrey G. Mangum ,  & 

  3. CASA, University of Colorado, Boulder, USA

    John Bally

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© 1997 Springer Science+Business Media Dordrecht

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Oka, T., Hasegawa, T., Handa, T., Sato, F., Tsuboi, M. (1997). CO Mapping of the Inner Few Hundred Parsecs of the Galaxy. In: Latter, W.B., Radford, S.J.E., Jewell, P.R., Mangum, J.G., Bally, J. (eds) CO: Twenty-Five Years of Millimeter-Wave Spectroscopy. International Astronomical Union / Union Astronomique Internationale, vol 170. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5414-7_13

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  • DOI: https://doi.org/10.1007/978-94-011-5414-7_13

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-0-7923-4284-7

  • Online ISBN: 978-94-011-5414-7

  • eBook Packages: Springer Book Archive

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