Speaker
Description
The thermal Sunyaev-Zeldovich (tSZ) effect and gravitational lensing of the cosmic microwave background (CMB) are powerful and complementary probes of cosmic structure formation: the former traces baryonic gas in galaxy clusters via Compton scattering, while the latter captures gravitational deflection by large-scale structure. Their cross-correlation constrains the relationship between baryonic gas and matter distribution across a broad range of redshifts, offering a window into baryonic feedback processes.
I present measurements of the tSZ–CMB lensing cross-correlation using maps from the South Pole Telescope over a 100 square-degree patch of the sky. I describe our approach to measuring the tSZ–CMB lensing cross-spectrum, including treatments of key systematic effects and mitigation strategies. I then outline our methodology for modeling of the signal, and the framework for parameter inference. Finally, I discuss the implications of this measurement for baryonic feedback models.