Speakers bureau talks list
|31 Jan 2018||CMB in Germany||John Carlstrom||CMB-S4 update||[[Media:]]|
|17-24 March 2018||Rencontres de Moriond: Cosmology||Victor Buza||CMB-S4 Performance-Based Constraints On Primordial Gravitational Waves||
The next-generation ground-based cosmic microwave background experiment, CMB-S4, will achieve new thresholds in the search for the B-mode polarization signature of primordial gravitational waves. To quantify these thresholds, as well as to propose an informed experimental configuration that will reach them, the CMB-S4 forecasting working group has developed a Fisher forecasting machinery targeted towards optimizing tensor-to-scalar parameter constraints in the presence of galactic foregrounds and gravitational lensing of the CMB. In this talk I will describe this framework and explain the uniqueness of this particular approach in basing the forecasts on scalings from actual analyses and multi-year achieved performances of the currently deployed BICEP/Keck series of experiments. In addition, I will detail our work on developing map-level noise simulations, and using various sky models, models of instrumental systematics, and analysis methods to explore the robustness of our findings, which most recently appeared in the CMB-S4 CDT report. Finally, I will talk about employing the Fisher framework in tandem with the simulations work to arrive at the currently proposed CMB-S4 strawman configuration.
|22 Jan 2018||18-23 March 2018||Snowcluster||Nick Battaglia||On Cluster Profiles with CMB-S4||
The next generation cosmic microwave background (CMB) experiment, CMB-S4, will make unprecedented measurements of secondary anisotropies in the CMB. I will focus on observations of the thermal and kinetic Sunyaev-Zel’dovich (SZ) effects, which will provide new windows into the thermodynamic properties of galaxy groups and clusters. I will show how we can constrain important baryonic processes, like feedback, that govern group and cluster formation through the high fidelity SZ profile measurements from CMB-S4. Additionally, I will describe the prospects to constrain fundamental physics from SZ observations and how to mitigate the modeling uncertainties associated with the baryonic processes that currently limit these constraints.