An estimator for the lensing potential from galaxy number counts
نویسندگان
چکیده
We derive an estimator for the lensing potential from galaxy number counts which contains a linear and quadratic term. show that this has much larger signal-to-noise ratio than corresponding intensity mapping. is due to additional term in count angular power spectrum present already at order. estimate future photometric surveys. find particularly high redshifts, $z\gtrsim 1.5$, signal noise can become of order 30. therefore claim surveys are excellent means measure tomographic spectra.
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ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2022
ISSN: ['1475-7516', '1475-7508']
DOI: https://doi.org/10.1088/1475-7516/2022/06/024