pop-cosmos: Forward modeling KiDS-1000 redshift distributions using realistic galaxy populations

arXiv (Cornell University) 2026 Preprint Open access

Read full text
Authors: 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
+4 more Angus H. Wright, Shangrong Li, Konrad H. Kuijken, Hendrik Hildebrandt
DOI: 10.48550/arxiv.2602.03935
Cited by: 0

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}

Fields of Study & Subjects

Galaxies: Formation Evolution Phenomena Cosmology and Gravitation Theories Stellar planetary and galactic studies

Publication details

Journal / source
arXiv (Cornell University)
Publication date
3 February 2026
Document type
Preprint