pop-cosmos: Forward modeling KiDS-1000 redshift distributions using realistic galaxy populations
Boris Leistedt, Hiranya V. Peiris, Anik Halder, Stephen Thorp, Daniel J. Mortlock, Arthur Loureiro, Justin Alsing, Gurjeet Jagwani, Madalina N. Tudorache, Sinan Deger, Joel Leja, Benedict Van den Bussche, Angus H. Wright, Shun-Sheng Li, Konrad Kuijken, Hendrik Hildebrandt
arXiv:2602.03935v1 Announce Type: new
Abstract: The accuracy of the cosmological constraints from Stage~IV galaxy surveys will be limited by how well the galaxy redshift distributions can be inferred. We have addressed this challenging problem for the Kilo-Degree Survey (KiDS) cosmic shear sample by developing a forward-modeling framework with two main ingredients: (1) the texttt{pop-cosmos} generative model for the evolving galaxy population, calibrated on textit{Spitzer} IRAC $textit{Ch.,1}arXiv:2602.03935v1 Announce Type: new
Abstract: The accuracy of the cosmological constraints from Stage~IV galaxy surveys will be limited by how well the galaxy redshift distributions can be inferred. We have addressed this challenging problem for the Kilo-Degree Survey (KiDS) cosmic shear sample by developing a forward-modeling framework with two main ingredients: (1) the texttt{pop-cosmos} generative model for the evolving galaxy population, calibrated on textit{Spitzer} IRAC $textit{Ch.,1}