IPMU Colloquium

Speaker: Youngsoo Park (Kavli IPMU)
Title: Cluster cosmology robust against projection effects: model validation and results from the SDSS redMaPPer catalog (Postdoc Colloquium)
Date (JST): Fri, Nov 26, 2021, 11:30 - 12:00
Place: Zoom
Related File: 2706.pdf
Abstract: Recent progress in cluster cosmology analyses have focused on forward modeling combinations of cluster observables to self-calibrate inherent systematic effects. We develop a new analysis pipeline towards this end, combining cluster abundances, cluster lensing, and cluster clustering, with a novel empirical model for a salient systematic effect known as projection effects. We validate our model with a blind cosmology challenge on simulations, and move to apply it on the SDSS redMaPPer cluster catalog in a blinded analysis. Our SDSS RM results show an interesting agreement with the DES Y1 cluster results, and we discuss possible implications and future prospects for cosmology with optical clusters.
Contact: https://ipmu.zoom.us/webinar/register/WN_VTTp-bOdQY6GHCMDQrFVIg
Remarks: IPMU Postdoc Colloquium Series
Registration necessary from here: https://ipmu.zoom.us/webinar/register/WN_VTTp-bOdQY6GHCMDQrFVIg