Sequential star formation in the Sh 254-258 molecular cloud: HHT maps of CO J=3-2 and 2-1 emission
Abstract
The molecular cloud associated with the Sh 254-258 group of 5 small H II regions appears to be forming a (late)-OB association. We have mapped the associated molecular cloud in the J=2-1 line of the CO molecule over 0.75o × 1o, and the CO J=3-2 line toward the 2 main peaks, with the University of Arizona Heinrich Hertz Submm Telescope (HHT). We propose a scenario for sequential formation of the stars exciting the H II regions, triggered by the compression/heating of the molecular gas.
- Publication:
-
Triggered Star Formation in a Turbulent ISM
- Pub Date:
- 2007
- DOI:
- 10.1017/S1743921307001846
- Bibcode:
- 2007IAUS..237..396B
- Keywords:
-
- ISM: clouds;
- ISM: molecules;
- submillimeter