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4.7. The CO 2–1/1–0 ratio in the disk and center of the Milky Way Galaxy

Published online by Cambridge University Press:  25 May 2016

Tetsuo Hasegawa ,
Jun-Ichi Morino ,
Tsuyoshi Sawada ,
Toshihiro Handa ,
Kumiko Sato ,
Tomoharu Oka ,
Seiichi Sakamoto ,
Kazuo Sorai ,
Masumichi Seta  and
Masahiko Hayashi
...Show all authors
Tetsuo Hasegawa
Affiliation:
Institute of Astronomy, The University of Tokyo, Osawa, Mitaka, Tokyo 181, Japan
Jun-Ichi Morino
Affiliation:
Institute of Astronomy, The University of Tokyo, Osawa, Mitaka, Tokyo 181, Japan
Tsuyoshi Sawada
Affiliation:
Institute of Astronomy, The University of Tokyo, Osawa, Mitaka, Tokyo 181, Japan
Toshihiro Handa
Affiliation:
Institute of Astronomy, The University of Tokyo, Osawa, Mitaka, Tokyo 181, Japan
Kumiko Sato
Affiliation:
The Institute of Physical and Chemical Research (RIKEN), Hirosawa, Wako, Saitama 351-01, Japan
Tomoharu Oka
Affiliation:
Nobeyama Radio Observatory, National Astronomical Observatory, Minamimaki, Minamisaku, Nagano 384-13, Japan
Seiichi Sakamoto
Affiliation:
Nobeyama Radio Observatory, National Astronomical Observatory, Minamimaki, Minamisaku, Nagano 384-13, Japan
Kazuo Sorai
Affiliation:
Communications Research Laboratories, Nukui-kita machi, Koganei, Tokyo 184, Japan
Masumichi Seta
Affiliation:
National Astronomical Observatory, Osawa, Mitaka, Tokyo 181, Japan
Masahiko Hayashi
Affiliation:
National Astronomical Observatory, Osawa, Mitaka, Tokyo 181, Japan
Leonardo Bronfman
Affiliation:
Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile
Jorge May
Affiliation:
Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile
Roy Booth
Affiliation:
Onsala Space Observatory, S-439 92 Onsala, Sweden
Lars-Åke Nyman
Affiliation:
Onsala Space Observatory, S-439 92 Onsala, Sweden
Peter Shaver
Affiliation:
European Southern Observatory, D-85748 Garching, Germany

Extract

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We are conducting a survey of the CO J=2-1 line emission in the southern Milky Way (the Tokyo-Onsala-ESO-Calán Galactic CO survey), using the 60-cm radio telescope (VST2) in La Silla, Chile. It is combined with the northern survey made with the identical telescope (VST1) at Nobeyama (e.g., Sakamoto et al. 1995), and is directly comparable with the Columbia survey of the CO J=1-0 emission (e.g., Dame et al. 1987).

Type
Part II. Nuclear Interstellar Medium
Information
Symposium - International Astronomical Union , Volume 184: The Central Regions of the Galaxy and Galaxies , 1998 , pp. 179 - 180
Copyright
Copyright © Kluwer 1998 

References

Dame, T. M., Ungrechts, H., Cohen, R. S., de Geus, E. J., Grenier, I.A., May, J., Murphy, D. C., Nyman, L. Å., & Thaddeus, P. (1987) A composite CO survey of the entire Milky Way, ApJ, 322, pp. 706–720.CrossRefGoogle Scholar
Oka, T., Hasegawa, T., Hayashi, M., Handa, T., & Sakamoto, S. (1997) CO (J=2-1) line observations of the Galactic center molecular cloud complex. II. Dynamical structure and physical conditions, ApJ in press.CrossRefGoogle Scholar
Sakamoto, S., Hasegawa, T., Hayashi, M., Handa, T., & Oka, T. (1995) An out-of-plane CO (J=2-1) survey of the Milky Way. I. The data, ApJS, 100, pp. 125–131.CrossRefGoogle Scholar