Oral Presentation
Self Similar Fragmentation and Magnetic Morphology in NGC6334 massive star forming region
It is controversial in the field that whether magnetic field plays a major role in interstellar medium (ICM) fragmentation. Also it is very hard to observe deep into star forming region across different scales to determine how significant magnetic field is. The dynamics of the magnetic field, gravity and turbulence is also in rigorous debate due to the observational difficulty.
This presentation aims at providing a survey of magnetic field from 100 pc to 0.1 pc scales inferred from polarimetric observations of a massive star forming region of NGC6334. In the region which stellar feedback is not significant, the magnetic field directions across the entire scale are not severally affected, and the field is dynamically important over the scales concerned. Furthermore, when investigating the self- similar morphology of the field lines, it is discovered that the hourglass-shaped magnetic field lines pinched at the gas column density peaks and the field strength is proportional to 0.4-power of the density, which is a strong indication that the fragmentation in NGC6334 is driven by magnetic fields. Moreover when investigate the magnetic field morphology together with the velocity spectrum, it is possible to have an estimation of the spectral index and the dissipation rate during the cascade.
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