Abstract
We propose a new method for probing the time variation of the effective Newton's constant G_{eff}, based on the optimal redshift weighting scheme, and demonstrate the efficacy using the DESI galaxy spectroscopic survey. We find that with the optimal redshift weights, the evolution of G_{eff}(z) can be significantly better measured: the uncertainty of G_{eff}(z) can be reduced by a factor of 2.2 ∼ 12.8 using the DESI BGS sample at z ≲ 0.45, and by a factor of 1.3 ∼ 4.4 using the DESI Emission Line Galaxies sample covering 0.65 ≲ z ≲ 1.65.
Original language  English 

Article number  32 
Number of pages  7 
Journal  The Astrophysical Journal 
Volume  877 
Issue number  1 
DOIs  
Publication status  Published  31 May 2019 
Keywords
 astroph.CO
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Data availability statement for 'Probing the time variation of the effective Newton's constant with optimal redshift weights'.
Li, J. (Creator) & Zhao, G. (Creator), IOP Publishing, 4 Apr 2019
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