Speaker
Pauline VIELZEUF
(cppm)
Description
In this talk, I will present a measurement of the intrinsic alignment (IA) signal of galaxies around cosmic voids using the Euclid-like Flagship simulation from the Euclid Collaboration. While IA has been extensively studied in overdense environments, its behaviour in underdense regions remains largely unexplored and may represent a systematic for future void–lensing analyses. We analyse red and blue galaxy populations separately and compare the signal with predictions from the linear alignment model. The redshift evolution of the IA amplitude is consistent with that of the general galaxy population. Our modelling also provides an estimate of the void bias which increases with redshift as expected.
Author
Pauline VIELZEUF
(cppm)