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7/7/2025 2:48:55 PM
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  • Seminars and Workshops
  • Institute of Astronomy and Astrophysics
Challenges and opportunities of multi-probe cluster cosmology

2022-05-03 14:00 - 15:30

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Seminar
Challenges and opportunities of multi-probe cluster cosmology
Abstract

Multiple cosmological probes in photometric surveys can measure the cosmic structure. These include cluster abundances and positions, galaxy positions, and weak gravitational lensing shear. In this talk, I will outline a program that combines all these probes to maximize the cosmological science return. Then, using recent results from the Dark Energy Survey as a pathfinder example, I will describe the challenges and opportunities of this program for upcoming large cosmological surveys. I will further present some of the recent progress in tackling these challenges. These include developments of a novel and general sampling scheme that reduces the computational cost of the analysis by more than a factor of 50 and improvements in survey simulations for analysis validation. This talk will be concluded by discussing the prospects of this multi-probe cluster cosmology program in the Rubin Observatory's LSST and CMB-S4 era.

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