Sep 24, 2020

Catherine Zucker , Harvard CfA

"Knitting Together a New 3D View of our "Milky Way Galaxy"

Until recently, much of our understanding of the 3D structure of our Milky Way was based on 2D observations of stars and dust, or spectral-line observations of gas. Distance measurements needed to turn the 2D sky into a 3D physical picture of the stars and interstellar clouds that form them were few and far between. In this talk, I will discuss how the rise of Gaia and large photometric surveys — in combination with new data science and visualization techniques — are quickly changing the landscape. In particular, I will show how 3D dust maps have received a huge distance resolution boost from Gaia, and how 3D dust can be “knitted” together with velocity information from gas and young stars to render new 3D spatial-kinematic views of our solar neighborhood, on scales of individual clouds to swaths of spiral arms. On small scales, I will present a new analysis of the 3D spatial topologies of local molecular clouds. And on large scales, I will show how many of these clouds are connected into a 2.7-kpc-long undulating structure called the Radcliffe Wave, which redefines our understanding of the Local Arm nearby.

Zoom Link:

Meeting ID: 885 1389 6776
Passcode: 713070

Event Details

Sep 24, 2020


Online Zoom meeting See Abstract

:Tea at 3:30PM Talk starts at 3:45 PM

Speaker Host:
Bob Benjamin

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