1 Introduction
• Single O-type star formation in mid-infrared bubbles and H II regions
2 W43 as a massive GMC complex in the Milky Way
2.1 W43 Main (G030.8-00.0) as a mini-starburst region in the Milky Way
2.2 G30.5
2.3 W43 South (G29.96-0.02)
3 Data sets
3.2 The CHIMPS project: JCMT \(^{13}\text{CO}\) \(J=3–2\) archive data
3.3 Spitzer infrared archive data
4 Results
4.2 CO distributions of the W43 giant molecular cloud complex
4.3 W43 Main
4.4 G30.5
4.5 W43 South (G29.96-0.02)
5 Discussion
5.2 Comparison of the star formation efficiency
5.3 Interpretation of the multiple clouds in W43 Main, G30.5, and W43 South
5.4 Spectral features indicative of cloud-cloud collisions
5.5 Interpretation of velocity distributions
5.6 Dense gas and multiple O-type star formation scenario in the W43 GMC complex
5.7 The frequency of cloud-cloud collisions in the W43 GMC complex
6 Conclusions