Abstract

Contributed Talk - Splinter GalaxyClusters

Wednesday, 09 September 2026, 14:30   (MW-1050)

Deep cluster weak lensing measurements with Euclid

Tim Schrabback
University of Innsbruck, Institute for Astro- and Particle Physics

In this talk I will highlight results from our pilot Euclid weak lensing study targeting the massive galaxy cluster Abell 2390. Our analysis demonstrates that Euclid can provide sensitive weak lensing shape measurements for galaxies that are significantly fainter than previously assumed based on conservative survey limits. This provides exciting prospects to extend the regime of sensitive Euclid cluster weak lensing measurements to higher redshifts, thereby increasing Euclid's redshift lever arm to constrain the cosmological model via the growth of the cluster mass function. (Based on Schrabback, T.: Congedo, G.; Gavazzi, R.; Hartley, W. G.; Jansen, H.; Kang, Y.; Kleinebreil, F.; et al., 2026, A&A 708, A345)