Paper Image

Galaxy surveys reveal evolution of bias and magnification

Published on:

2 October 2023

Primary Category:

Cosmology and Nongalactic Astrophysics

Paper Authors:

Shivam Pandey,

Carles Sánchez,

Bhuvnesh Jain,

The LSST Dark Energy Science Collaboration


Key Details

Galaxy bias and magnification plausibly evolve within tomographic redshift bins

This impacts galaxy clustering and galaxy-galaxy lensing differently

Leads to apparent decorrelation of galaxy clustering and lensing

Biases cosmological constraints at 1-sigma level if unmodeled

Joint analysis with cross-bin correlations can constrain evolution

AI generated summary

Galaxy surveys reveal evolution of bias and magnification

This paper analyzes galaxy clustering and weak lensing in imaging surveys. It shows that plausible evolution of galaxy bias and magnification within tomographic redshift bins impacts cosmological constraints at the 1-sigma level for future surveys. Cross-bin correlations help constrain this evolution.

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