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- W3083533142 abstract "We demonstrate the utility and constraining power of a new statistic for investigating galaxy bias: the galaxy-lensing phase difference. The statistic consists in taking the differences of the phases of the harmonic wave-modes between the weak lensing convergence field and the galaxy count field. We use dark matter simulations populated with galaxies up to redshift $z=1$ to test the performance of this estimator. We find that phase differences are sensitive to the absolute value of the second order bias ($c_2=b_2/b_1$), and demonstrate why this is the case. For a $sim$1500 sq. deg. galaxy survey we recover $c_2$ with an error of approximately $0.1$ for a wide range of $c_2$ values; current constraints from redshift surveys have errors of 0.1-0.6 depending on redshift. This new statistic is therefore expected to provide constraints for $c_2$ which are complementary and competitive with constraining power by the conventional estimators from the power spectrum and bispectrum. For the Dark Energy Survey (DES), we predict leading measurements of second-order bias." @default.
- W3083533142 created "2020-09-11" @default.
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- W3083533142 date "2021-07-24" @default.
- W3083533142 modified "2023-10-16" @default.
- W3083533142 title "Obtaining nonlinear galaxy bias constraints from galaxy-lensing phase differences" @default.
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- W3083533142 doi "https://doi.org/10.1093/mnras/stab1985" @default.
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