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Cloud-cloud collision in the Sgr B2 molecular cloud complex

Published online by Cambridge University Press:  22 May 2014

Masato Tsuboi ,
Atsushi Miyazaki  and
Toshihiro Handa
Masato Tsuboi
Affiliation:
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan email: tsuboi@vsop.isas.jaxa.jp
Atsushi Miyazaki
Affiliation:
Korean VLBI Network, Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseon-gu, Daejeon 305-348, Republic of Korea
Toshihiro Handa
Affiliation:
Graduate School of Science and Engineering, Kagoshima University, Kagoshima, Kagoshima, 890-0065, Japan
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Abstract

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We present results from a high-resolution wide-field imaging observation of the central molecular zone (CMZ) in H13CO+J = (1 − 0) and SiO v=0, J = (2−1) emission lines by using the Nobeyama 45-m telescope in order to depict the high-density molecular gas mass distribution and explore molecular gas affected by interstellar shocks. We found a candidate for ongoing cloud-cloud collision in the Sgr B2 complex. This is identified as a hollow paraboloid-like structure in the l−b−v data cube of both emission lines. The central part of the feature is denser and warmer than the outer envelope and contains a vast amount of shocked molecular gas. These properties are consistent with those expected from simulations of cloud-cloud collisions in the CMZ.

Keywords

central molecular zoneSgr B2 molecular cloudyoung massive clusters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S303: The Galactic Center: Feeding and Feedback in a Normal Galactic Nucleus , October 2013 , pp. 188 - 190
Copyright
Copyright © International Astronomical Union 2014 

References

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