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- W2092023662 abstract "We study how 21 cm intensity mapping can be used to measure gravitational lensing over a wide range of redshift. This can extend weak lensing measurements to higher redshifts than are accessible with conventional galaxy surveys. We construct a convergence estimator taking into account the discreteness of galaxies and calculate the expected noise level as a function of redshift and telescope parameters. At $z sim 2-3$ we find that a telescope array with a collecting area $sim 0.2 , {rm km}^2$ spread over a region with diameter $sim 2 , {rm km}$ would be sufficient to measure the convergence power spectrum to high accuracy for multipoles between 10 and 1,000. We show that these measurements can be used to constrain interacting dark energy models." @default.
- W2092023662 created "2016-06-24" @default.
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- W2092023662 date "2014-01-03" @default.
- W2092023662 modified "2023-09-26" @default.
- W2092023662 title "Weak lensing with 21 cm intensity mapping at z 2-3" @default.
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- W2092023662 doi "https://doi.org/10.1093/mnrasl/slt175" @default.
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