Lensing convergence and the neutrino mass scale in galaxy redshift surveys
Abstract
We demonstrate the importance of including the lensing contribution in galaxy clustering analyses with large galaxy redshift surveys. It is well known that radial cross-correlations between different redshift bins of galaxy surveys are dominated by lensing. But we show here that also neglecting lensing in the autocorrelations within one bin severely biases cosmological parameter estimation with redshift surveys. It leads to significant shifts for several cosmological parameters, most notably the scalar spectral index and the neutrino mass scale. Especially the latter parameter is one of the main targets of future galaxy surveys.
Keywords
Cite
@article{arxiv.1603.06481,
title = {Lensing convergence and the neutrino mass scale in galaxy redshift surveys},
author = {Wilmar Cardona and Ruth Durrer and Martin Kunz and Francesco Montanari},
journal= {arXiv preprint arXiv:1603.06481},
year = {2016}
}
Comments
Version accepted in PRD. We added both a MCMC analysis including Planck priors and a Fisher matrix analysis, discussed the significance of lensing detection, and included two appendices. Conclusions unchanged