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4.3. A large-scale CO imaging of the Galactic center by the Nobeyama 45-m telescope: shell statistics and star formation history

Published online by Cambridge University Press:  25 May 2016

Tetsuo Hasegawa ,
Tomoharu Oka ,
Fumio Sato ,
Masato Tsuboi  and
Atsushi Yamazaki
Tetsuo Hasegawa
Affiliation:
Institute of Astronomy, The University of Tokyo, Osawa, Mitaka, Tokyo 181, Japan
Tomoharu Oka
Affiliation:
The Institute of Physical and Chemical Research (RIKEN), Hirosawa, Wako, Saitama 351-01, Japan
Fumio Sato
Affiliation:
Department of Astronomy and Earth Sciences, Tokyo Gakugei University
Masato Tsuboi
Affiliation:
Nukui-kita machi, Koganei, Tokyo 184, Japan
Atsushi Yamazaki
Affiliation:
Institute of Astrophysics and Planetary Sciences, Ibaraki University Bunkyo, Mito, Ibaraki 310, Japan

Extract

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As a key program of the 45-m telescope at Nobeyama Radio Observatory, we have made high-resolution CO images of the Galactic center region with the 2×2 focal plane array receiver. The data consist of 44,000 12CO and 13,000 13CO spectra taken with 16″ beams spaced by 34″. The 12CO image covers roughly −1.5° ≤ l ≤ +3.4° and −0.6° ≤ b ≤ +0.6° (Oka et al. 1997b)

Type
Part II. Nuclear Interstellar Medium
Information
Symposium - International Astronomical Union , Volume 184: The Central Regions of the Galaxy and Galaxies , 1998 , pp. 171 - 172
Copyright
Copyright © Kluwer 1998 

References

Oka, T., Hasegawa, T., Hayashi, M., Handa, T., & Sakamoto, S. (1997a) CO (J=2-1) line observations of the Galactic center molecular cloud complex. II. Dynamical structure and physical conditions, ApJ in press.Google Scholar
Oka, T., Hasegawa, T., Sato, F., Tsuboi, M., & Miyazaki, A. (1997b) A large-scale CO imaging of the Galactic center, ApJS, submitted.Google Scholar
Spergel, N., & Blitz, L. (1992) Extreme gas pressures in the Galactic bulge, Nature, 357, pp. 665–666.CrossRefGoogle Scholar