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ASTE observations of dense molecular gas in galaxies

Published online by Cambridge University Press:  01 August 2006

K. Kohno ,
K. Muraoka ,
K. Nakanishi ,
T. Tosaki ,
N. Kuno ,
R. Miura ,
T. Sawada ,
K. Sorai ,
T. Okuda  and
K. Kamegai
...Show all authors
K. Kohno
Affiliation:
University of Tokyo email: [email protected]
K. Muraoka
Affiliation:
University of Tokyo email: [email protected]
K. Nakanishi
Affiliation:
National Astronomical Observatory of Japan
T. Tosaki
Affiliation:
National Astronomical Observatory of Japan
N. Kuno
Affiliation:
National Astronomical Observatory of Japan
R. Miura
Affiliation:
University of Tokyo email: [email protected] National Astronomical Observatory of Japan
T. Sawada
Affiliation:
National Astronomical Observatory of Japan
K. Sorai
Affiliation:
Hokkaido University
T. Okuda
Affiliation:
University of Tokyo email: [email protected]
K. Kamegai
Affiliation:
University of Tokyo email: [email protected]
K. Tanaka
Affiliation:
University of Tokyo email: [email protected]
A. Endo
Affiliation:
University of Tokyo email: [email protected] National Astronomical Observatory of Japan
B. Hatsukade
Affiliation:
University of Tokyo email: [email protected]
H. Ezawa
Affiliation:
National Astronomical Observatory of Japan
S. Sakamoto
Affiliation:
National Astronomical Observatory of Japan
J. Cortes
Affiliation:
National Astronomical Observatory of Japan University of Chile
N. Yamaguchi
Affiliation:
National Astronomical Observatory of Japan
H. Matsuo
Affiliation:
National Astronomical Observatory of Japan
R. Kawabe
Affiliation:
National Astronomical Observatory of Japan
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Abstract

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Atacama Submillimeter Telescope Experiment (ASTE) is a joint project between Japan and Chile for installing and operating a 10 m high precision telescope in the Atacama Desert in order to explore the southern sky through the submillimeter wavelength. We have achieved an accuracy of 19 μm (rms) for the main reflector surface and a stable radio pointing accuracy of about 2 arcsec (rms). A 350 GHz cartridge type SIS mixer receiver achieves good performance with a typical system noise temperature of 150 ~ 250 K in DSB and a main beam efficiency of 0.6 ~ 0.7 during winter nights.

A large scale CO(3-2) imaging survey of nearby galaxies using ASTE is now in progress. One of our goals is to compare our wide area CO(3-2) images with existing CO(1-0) data as well as distributions of massive star formation tracers (i.e., Hα and radio continuum emission) in order to understand the physical mechanism which controls the global star formation properties such as star formation efficiency. Initial CO(3-2) maps of some sample galaxies (M 83, NGC 604 in M 33, NGC 1672, & NGC 7130) are reported.

Keywords

galaxies: ISMgalaxies: starburstsubmillimetertelescopes
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S237: Triggered Star Formation in a Turbulent ISM , August 2006 , pp. 436
Copyright
Copyright © International Astronomical Union 2007

References

Muraoka, K. et al. 2006, PASJ submittedGoogle Scholar
Tosaki, T. et al. 2006, this volumeGoogle Scholar