Speaker: Yuxin Lin (chair: Pedro Humire)
Title: Internal structure of massive star-forming clumps
Massive clumps are precursors of OB clusters. Understanding the evolution of massive clump is crucial for establishing massive star formation scenario. Theoretical works have shown that clump density structures have decisive impact on fragmentation, accretion process and eventually on the star formation rate. We aim to establish a systematic view of massive clump gas structure along evolutionary track. In our pilot SMA+APEX survey, we use transitions of multiple gas thermometers and densitometers to derive the spatially-resolved temperature and density profiles on 0.1 pc-1 pc scale towards 6 massive clumps at different evolutionary stages. This is the missing link between the possible global hierarchical collapse and the ongoing star-formation process in dense cores.