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Physical Conditions of Molecular Gas in the Galaxy

Published online by Cambridge University Press:  25 May 2016

S. Sakamoto ,
T. Hasegawa ,
T. Handa ,
T. Oka  and
M. Hayashi
S. Sakamoto
Affiliation:
Institute of Astronomy, University of Tokyo Osawa, Mitaka, Tokyo 181, Japan
T. Hasegawa
Affiliation:
Institute of Astronomy, University of Tokyo Osawa, Mitaka, Tokyo 181, Japan
T. Handa
Affiliation:
Institute of Astronomy, University of Tokyo Osawa, Mitaka, Tokyo 181, Japan
T. Oka
Affiliation:
Institute of Astronomy, University of Tokyo Osawa, Mitaka, Tokyo 181, Japan
M. Hayashi
Affiliation:
National Astronomical Observatory Osawa, Mitaka, Tokyo 181, Japan

Extract

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Physical conditions of molecular gas are key parameters to the formation rate and initial mass function of stars formed in molecular clouds. The ongoing Tokyo-NRO survey has been observing the Galactic CO (J=2–1) emission with a beamsize matched to the Columbia CO (J=1–0) survey. Intensities of the two lines should reflect physical conditions of the CO-emitting gas. An out-of-plane survey of the inner Galaxy which covers from 20° to 60° in galactic longitude and from −1° to +1° in galactic latitude with grid spacings of 0.25° has already been made (Sakamoto et al. 1994). Its coverage is large enough to draw conclusions on global properties of molecular gas in the inner Galaxy.

Type
Chapter 6: How are we to Understand the Large Scale Structure of the ISM?
Information
Symposium - International Astronomical Union , Volume 169: Unsolved Problems of the Milky Way , 1996 , pp. 501 - 503
Copyright
Copyright © Kluwer 1996 

References

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Handa, T., Hasegawa, T., Hayashi, M., Sakamoto, S., Oka, T., & Dame, T. M. 1993, in Back to the Galaxy, ed. Holt, S. S. & Verter, F. (New York : AIP), 315 Google Scholar
Sakamoto, S., Hasegawa, T., Hayashi, M., Handa, T., & Oka, T. 1994, ApJS, submitted Google Scholar