Structure growth from cross-correlation of DESI Luminous Red Galaxies and CMB lensing

Mar 18, 2024 - 11:00 am to 12:00 pm

Campus, Varian 355

Noah Sailer (UC Berkeley) In Person and zoom

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In this talk, I will present ongoing work from which we constrain the amplitude of large-scale structure using the DESI Luminous Red Galaxy sample and its cross-correlation with CMB lensing maps reconstructed from the latest ACT and Planck data. I will pay close attention to potential sources of systematic errors (in the data, modeling, and statistical inference) and our approaches for mitigating them when necessary. Along the way I’ll highlight several subtitles that are peculiar to CMB cross-correlation analyses in a pedagogical fashion. Finally, I will discuss how preliminary results from this analysis weigh in on the S8 “tension.”