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Webinar ID: 940 0286 6957
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ABSTRACT: One of the key objectives of modern astrophysics is to understand the formation and evolution of galaxies. In this regard, the Milky Way is a critical testing ground for our theories of galaxy formation. However, dissecting the assembly history of the galaxy requires a detailed mapping of the structural, dynamical chemical, and age distributions of its stellar populations. Recently, we have entered an era of large spectroscopic and astrometric surveys which has begun to pave the way for the exciting advancements in this field. Combining data from the many multi-object spectroscopic surveys already underway and the rich dataset from Gaia will undoubtedly be the way forward in order to disentangle the full chemo-dynamical history of our Galaxy. In this talk, I will discuss my current work in Galactic archaeology and how large spectroscopic surveys can and have been used to dissect the structure of our Galaxy. I will also explore the future of Galactic archaeology through chemical cartography.

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Webinar ID: 923 3501 3501
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ABSTRACT: 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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US: +1 213 338 8477 or +1 669 219 2599 or +1 669 900 6833
Webinar ID: 926 6575 1568
International numbers available: https://ucsd.zoom.us/u/aHxonUnWj