Turbulence vs. Magnetic Field: which one is more important in the modern picture of star formation?

Date: 
Wednesday, October 28, 2020 - 3:30pm PDT
Speaker: 
Che-Yu Chen
Affiliation: 
UVA/ LLNL
Location: 
Online
Event Type: 
Colloquium

 

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Magnetic field, turbulence, and gas gravity are considered the key agents regulating the star forming process throughout different evolutionary stages. Despite rich observational results, it is still unclear how dynamically significant the magnetic fields are with respect to gravity and turbulence at varying physical scales, because neither the strength nor 3D structure of the magnetic field can be directly measured through observation. Motivated by the advanced polarimetric capabilities of Planck, BLASTPol, and SOFIA, our recent theoretical efforts and statistical examinations utilizing 3D MHD simulations have provided new ways to characterize the 3D field structure and the relative importance of gas gravity and the magnetic field. We are also working toward a comprehensive understanding of the kinematics within star-forming cores through both observations and simulations. With our ongoing survey with GBT-Argus, we aim to establish a broad statistical sample of the internal velocity structure within dense cores, which will provide important insight on the evolution and transport of angular momentum during core collapse under the influence of the local magnetic field.

 

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