Cosmic Rhythms

Session

Baryonic Physics & Feedback II

12 Sept 2026, 11:00

Auditório Ministro João Alberto Lins e Barros (CBPF)

18. The impact and interplay of analysis choices in upcoming cosmic shear studies

Naomi Robertson (University of Edinburgh)

12/09/2026, 11:15

Oral Talk

Achieving robust cosmological constraints from cosmic shear involves several stages and many different analysis choices. Recent galaxy weak lensing analyses (DES & KiDS 2023) have shown that small shifts in parameter constraints are exacerbated by some combinations of analysis choices. As constraining power from cosmic shear improves, more complex modelling and accounting of systematics is...

63. Mass dependence of halo baryon fractions from the kinetic Sunyaev-Zeldovich effect

Finn Roper (University of Edinburgh)

12/09/2026, 11:45

Oral Talk

We detect the kinetic Sunyaev-Zeldovich imprint of peculiar motions of galaxy groups and clusters, using the photometric DESI Legacy Survey together with cosmic microwave background (CMB) maps from the Atacama Cosmology Telescope (ACT). We develop a comprehensive forward model based on the AbacusSummit cosmological simulations: mock galaxy group catalogues and synthetic kSZ maps are generated,...