Oral Presentation

Evidence for dynamically important magnetic fields on massive star and cluster formation

Author(s): Eswaraiah C (NTHU, Taiwan) and Shih-Ping Lai (NTHU, Taiwan)

Presenter: Eswaraiah Chakali (NTHU)

While the low mass star-formation has been understood considerably well, the processes governing massive star-formation have not been well understood. Especially, the role of B-fields relative to turbulence and gravity has been remain poorly constrained. Using near-infrared polarimetry towards a massive star-forming region RCW57A, we have evidenced morphological correlations among the filament, bipolar bubble and magnetic fields. These results shed light on the implications towards the understanding on formation and fragmentation of filament into massive clumps, to cores, and subsequently to stars. The cores embedded in dense filament of RCW57A are associated with water/methanol maser sources, and are predicted to be forming massive Class 0/I protostars. In this talk I will present our findings towards understanding the influence of magnetic fields not only in the star and cluster formation, but also on feedback process such as regulation of both outflows and expanding ionization fronts to form conspicuously spectacular bipolar bubbles.