| Issue |
EAS Publications Series
Volume 31, 2008
Far-Infrared Workshop 2007
|
|
|---|---|---|
| Page(s) | 211 - 212 | |
| DOI | https://doi.org/10.1051/eas:0831049 | |
| Published online | 04 October 2008 | |
C. Kramer, S. Aalto and R. Simon (eds)
EAS Publications Series, 31 (2008) 211-212
NRO 45 M and ASTE 10 M observations of dense gas in giant HII regions of M 33
1
Nobeyama Radio Observatory, National Astronomical Observatory of Japan, Japan
2
The University of Tokyo, Japan
Corresponding author: omoka@nro.nao.ac.jp
Wepresent 12CO(J = 3–2) and 12CO(J = 1–0) observations of the supergiant Hii region NGC 604 in the nearest face-on spiral galaxy M 33 using the Atacama Submillimeter Telescope Experiment (ASTE) 10-m and the Nobeyama Radio Observatory (NRO) 45-m telescopes. We found high 12CO(J = 3–2)/12CO(J = 1–0) ratio gas with an arc-like distribution (“high-ratio gas arc”) surrounding the central star cluster of NGC 604. Our results suggest that dense gas formation and second-generation star formation occur in the surrounding gas compressed by the stellar wind and/or supernova of the first-generation stars of NGC 604, i.e., the central star cluster of NGC 604. Thus, NGC 604 is an example of large-scale sequential star formation.
© EAS, EDP Sciences, 2008