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2015

Measuring the lensing potential with tomographic galaxy number counts

Montanari, Francesco, Durrer, Ruth

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We investigate how the lensing potential can be measured tomographically with future galaxy surveys using their number counts.

Such a measurement is an independent test of the standard $\Lambda$CDM framework and can be used to discern modified theories of gravity.
We perform a Fisher matrix forecast based on galaxy angular-redshift power spectra, assuming specifications consistent with future photometric Euclid-like surveys and spectroscopic SKA-like surveys.
For the Euclid-like survey we derive a fitting formula for the magnification bias.

Measuring the lensing potential with tomographic galaxy number counts · Around

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