Tuesday Physics Seminar: Probing Cosmic Acceleration

Tuesday, January 29, 2019 The event started -115 days ago

2:50 PM 3:50 PM

Optics Building

Room 234 - 237

Probing Cosmic Acceleration with Galaxy Clusters

Hao-Yi Wu (Ohio State)

The acceleration of the Universe is one of the biggest puzzles in physics: is it due to a cosmological constant, dynamical dark energy, or modification of gravity?  Galaxy clusters provide a unique opportunity to answer this question.  In this talk, I will first discuss how we use large sky surveys of galaxy clusters to study cosmic acceleration.  In these surveys, a major challenge is to accurately calibrate the mass of clusters.  I will then present my research on using simulations to improve mass calibration methods, including galaxy dynamics, weak gravitational lensing, and X-ray observations.  These results not only mitigate the systematic errors in current cluster surveys but also help the optimization of future ground- and space-based missions.


College of Science, Physics and Astronomy
Public, Students, Alumni


Ming Sun This email address is being protected from spambots. You need JavaScript enabled to view it.


Optics Building

John Wright Blvd.Huntsville, AL 35899

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