Testing gravitational physics by combining DESI DR1 and weak lensing datasets using the E_G estimator
Abstract
The action of gravitational physics across space-time creates observable signatures in the behaviour of light and matter. We perform combined-probe studies using data from the Baryon Oscillation Spectroscopic Survey (BOSS) and Dark Energy Spectroscopic Instrument survey Data Release 1 (DESI-DR1), in combination with three existing weak lensing surveys, the Kilo-Degree Survey (KiDS), the Dark Energy Survey (DES), and the Hyper Suprime-Cam Survey (HSC), to test and constrain General Relativity (GR) in the context of the standard model of cosmology (LCDM). We focus on measuring the gravitational estimator statistic, E_G, which describes the relative amplitudes of weak gravitational lensing and galaxy velocities induced by a common set of overdensities. By comparing our amplitude measurements with their predicted scale- and redshift-dependence within the GR+LCDM model, we demonstrate that our results are consistent with the predictions of the Planck cosmology. The redshift span of the DESI dataset allows us to perform these E_G measurements at the highest redshifts achieved to date, z ~ 1.
Cite
@article{arxiv.2507.16098,
title = {Testing gravitational physics by combining DESI DR1 and weak lensing datasets using the E_G estimator},
author = {S. J. Rauhut and C. Blake and U. Andrade and H. E. Noriega and J. Aguilar and S. Ahlen and S. BenZvi and D. Bianchi and D. Brooks and T. Claybaugh and A. Cuceu and A. de la Macorra and J. DeRose and P. Doel and N. Emas and S. Ferraro and J. E. Forero-Romero and C. Garcia-Quintero and E. Gaztañaga and G. Gutierrez and S. Heydenreich and K. Honscheid and C. Howlett and D. Huterer and M. Ishak and S. Joudaki and R. Joyce and E. Jullo and R. Kehoe and D. Kirkby and A. Kremin and A. Krolewski and O. Lahav and A. Lambert and C. Lamman and M. Landriau and J. U. Lange and L. Le Guillou and A. Leauthaud and M. Manera and A. Meisner and R. Miquel and S. Nadathur and J. A. Newman and G. Niz and N. Palanque-Delabrouille and W. J. Percival and A. Porredon and F. Prada and I. Pérez-Ràfols and G. Rossi and R. Ruggeri and E. Sanchez and C. Saulder and D. Schlegel and A. Semenaite and J. Silber and D. Sprayberry and Z. Sun and G. Tarlé and B. A. Weaver and P. Zarrouk and R. Zhou and H. Zou},
journal= {arXiv preprint arXiv:2507.16098},
year = {2025}
}
Comments
20 pages, 9 figures, published in the Open Journal of Astrophysics