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Ph.D. Candidate:  Chun-Hao To

Research Advisor:  Risa Wechsler 

Date: Tuesday, June 29, 2001
Time: 11:00 AM (PDT)
Zoom Link:

Zoom Password: email for password

Multi-probe cluster cosmology analyses with photometric surveys



This thesis aims at improving our understandings of the universe by observations of galaxy clusters in photometric surveys. In the first part of the talk, I will present an analysis that quantifies the connections between red galaxies and their host dark matter halos by modeling luminosity functions of galaxies in galaxy clusters. In the second part of the talk, I will present the first joint analysis of cluster abundances and three cosmic tracer fields measured from photometric surveys: galaxy density, weak gravitation lensing shear, and cluster density. In this part of the talk, I will first describe the extensive validation of the measurements, modeling, and inferences using N-body simulations populated with galaxies. Then, I will present the cosmological constraints from this combination within the context of the Lambda-CDM model using data taken in the first season of the Dark Energy Survey (DES-Y1).  Finally, I will show prospects of this analysis with data from the Legacy Survey of Space and Time (LSST).


June 29, 2021 - 11:00am