14–16 May 2024
CERN
Europe/Zurich timezone

Cosmology from ACT DR6 lensing cross-correlated with DES Y3 galaxies

14 May 2024, 11:54
5m
500/1-001 - Main Auditorium (CERN)

500/1-001 - Main Auditorium

CERN

400
Show room on map
late universe Late Universe

Speaker

Omar Darwish (University of Geneva)

Description

In this work we present our pipeline for a joint analysis at the angular power spectrum level between measurements of galaxy positions from Dark Energy Survey Years 3 data release (DES Y3) and CMB lensing from the Atacama Cosmology Telescope Year 6 data release (ACT DR6) on a common area of around $4000\ \rm{deg}^2$. We show preliminary results, including several null-tests and inference on realistic mocks to achieve few percent level constraints on the amplitude of matter fluctuations. In a future work we will combine this measurement in a joint analysis with DES Y3 cosmic shear data, setting the stage for next generation cross-correlation analyses.

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Primary author

Omar Darwish (University of Geneva)

Presentation materials