ASTE observations of dense molecular gas in galaxies

K. Kohno, K. Muraoka, K. Nakanishi, T. Tosaki, N. Kuno, R. Miura, T. Sawada, K. Sorai, T. Okuda, K. Kamegai, K. Tanaka, A. Endo, B. Hatsukade, H. Ezawa, S. Sakamoto, J. Cortes, N. Yamaguchi, H. Matsuo, R. Kawabe

Research output: Contribution to journalArticle


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 m (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., H 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.

Original languageEnglish
Number of pages1
JournalProceedings of the International Astronomical Union
Issue numberS237
Publication statusPublished - 2006 Aug 1
Externally publishedYes



  • Galaxies: ISM
  • Galaxies: starburst
  • Submillimeter
  • Telescopes

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science

Cite this

Kohno, K., Muraoka, K., Nakanishi, K., Tosaki, T., Kuno, N., Miura, R., Sawada, T., Sorai, K., Okuda, T., Kamegai, K., Tanaka, K., Endo, A., Hatsukade, B., Ezawa, H., Sakamoto, S., Cortes, J., Yamaguchi, N., Matsuo, H., & Kawabe, R. (2006). ASTE observations of dense molecular gas in galaxies. Proceedings of the International Astronomical Union, 2(S237).