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Events on Thursday, September 24th, 2020

Cosmology Journal Club
Time: 12:00 pm - 1:00 pm
Abstract: Cosmology Journal Club is back! We will be having virtual meetings this semester.

Each week, we start with a couple scheduled 15 minute talks about one's research, or an arXiv paper. The last 30 minutes will typically be open to the group for anyone to discuss an arXiv paper.

All are welcome and all fields of cosmology are appropriate.

Contact Ross Cawthon, cawthon@wisc, for more information.

Zoom info
Meeting ID: 93592708053, passcode: cmbadger

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Graduate Program Event
PhD Defense
Time: 3:30 pm - 5:30 pm
Place: Zoom,
Speaker: Usama Hussain, UW-Madison
Abstract: Measurements of ZZ Production Cross Sections using four-lepton events and constraints on anomalous triple gauge couplings at √s =13 TeV using the CMS detector at the CERN LHC
Host: Sridhara Dasu
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Astronomy Colloquium
Knitting Together a New 3D View of our "Milky Way Galaxy".
Time: 3:45 pm - 5:30 pm
Place: Zoom meeting(see Abstract ) Coffee and tea 3:30 pm, Talk 3:45 PM
Speaker: Catherine Zucker, Harvard CfA
Abstract: 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
Host: Robert Benjamin, UW Astronomy Department
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