Gravity Group Lunch Seminar, Srini Raghunathan (University of Melbourne, AU), "Measuring masses of galaxy clusters using CMB-cluster lensing"

Fri, Sep 22, 2017, 12:00 pm

Galaxy clusters are the largest gravitationally bound objects in the Universe and are excellent cosmological probes. Their power as cosmological probes, however, is currently limited by the systematics involved in the measurement of their mass. In this talk, I will discuss the method to estimate their masses using the weak-gravitational lensing of the CMB radiation. I will explain the systematics involved in the measurements and the importance of using CMB polarization data in the future. Finally, I will discuss the uncertainties in the mass estimates for the current CMB experiments and provide realistic forecasts for the CMB-S3/S4 experiments.
Reference: arXiv: 1705.00411

Salads, sandwiches, and wraps are catered by D'Angelo Italian Market.
Bottled water will be provided.

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Joseph Henry Room