TY - JOUR
T1 - Testing gravity using galaxy-galaxy lensing and clustering amplitudes in KiDS-1000, BOSS, and 2dFLenS
AU - Blake, Chris
AU - Amon, Alexandra
AU - Asgari, Marika
AU - Bilicki, MacIej
AU - Dvornik, Andrej
AU - Erben, Thomas
AU - Giblin, Benjamin
AU - Glazebrook, Karl
AU - Heymans, Catherine
AU - Hildebrandt, Hendrik
AU - Joachimi, Benjamin
AU - Joudaki, Shahab
AU - Kannawadi, Arun
AU - Kuijken, Konrad
AU - Lidman, Chris
AU - Parkinson, David
AU - Shan, Huanyuan
AU - Tröster, Tilman
AU - Van Den Busch, Jan Luca
AU - Wolf, Christian
AU - Wright, Angus H.
N1 - Publisher Copyright:
© ESO 2020.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - The physics of gravity on cosmological scales affects both the rate of assembly of large-scale structure and the gravitational lensing of background light through this cosmic web. By comparing the amplitude of these different observational signatures, we can construct tests that can distinguish general relativity from its potential modifications. We used the latest weak gravitational lensing dataset from the Kilo-Degree Survey, KiDS-1000, in conjunction with overlapping galaxy spectroscopic redshift surveys, BOSS and 2dFLenS, to perform the most precise existing amplitude-ratio test. We measured the associated EG statistic with 15 - 20% errors in five Δz = 0.1 tomographic redshift bins in the range 0.2 < z < 0.7 on projected scales up to 100 h-1 Mpc. The scale-independence and redshift-dependence of these measurements are consistent with the theoretical expectation of general relativity in a Universe with matter density ωm = 0.27 ± 0.04. We demonstrate that our results are robust against different analysis choices, including schemes for correcting the effects of source photometric redshift errors, and we compare the performance of angular and projected galaxy-galaxy lensing statistics.
AB - The physics of gravity on cosmological scales affects both the rate of assembly of large-scale structure and the gravitational lensing of background light through this cosmic web. By comparing the amplitude of these different observational signatures, we can construct tests that can distinguish general relativity from its potential modifications. We used the latest weak gravitational lensing dataset from the Kilo-Degree Survey, KiDS-1000, in conjunction with overlapping galaxy spectroscopic redshift surveys, BOSS and 2dFLenS, to perform the most precise existing amplitude-ratio test. We measured the associated EG statistic with 15 - 20% errors in five Δz = 0.1 tomographic redshift bins in the range 0.2 < z < 0.7 on projected scales up to 100 h-1 Mpc. The scale-independence and redshift-dependence of these measurements are consistent with the theoretical expectation of general relativity in a Universe with matter density ωm = 0.27 ± 0.04. We demonstrate that our results are robust against different analysis choices, including schemes for correcting the effects of source photometric redshift errors, and we compare the performance of angular and projected galaxy-galaxy lensing statistics.
KW - Dark energy
KW - Gravitational lensing: weak
KW - Large-scale structure of Universe
KW - Surveys
UR - http://www.scopus.com/inward/record.url?scp=85093953537&partnerID=8YFLogxK
U2 - 10.1051/0004-6361/202038505
DO - 10.1051/0004-6361/202038505
M3 - Article
SN - 0004-6361
VL - 642
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
M1 - A158
ER -