Measuring lensing ratios with future cosmological surveys
| dc.contributor.author | Ballardini, Mario | |
| dc.contributor.author | Bermejo-Climent, Jos´e Ramón | |
| dc.contributor.author | Finelli, Fabio | |
| dc.date.accessioned | 2021-02-15T11:27:46Z | |
| dc.date.available | 2021-02-15T11:27:46Z | |
| dc.date.issued | 2020 | |
| dc.description.abstract | The ratio between the CMB lensing/galaxy counts and the galaxy shear/galaxy counts cross-correlations combines the information from different cosmological probes to infer cosmographic measurements that are less dependent on astrophysical uncertainties and can constrain the geometry of the Universe. We discuss the future perspectives for the measurement of this lensing ratio as previously introduced, i.e., with the use of the Limber and flat-sky approximations and neglecting all the effects on the galaxy survey from observing on the past light cone. We then show how the cosmological information in this estimator is affected by the Limber approximation and by the inclusion of the redshift space distortions (RSD) and lensing magnification contributions to the galaxy number counts. | en_US |
| dc.identifier.citation | Ballardini, M. et al. (2020). Measuring lensing ratios with future cosmological surveys. PHYSICAL REVIEW D, 102(2), 023502 | en_US |
| dc.identifier.issn | 2470-0029 | |
| dc.identifier.uri | https://doi.org/10.1103/PhysRevD.102.023502 | |
| dc.identifier.uri | http://hdl.handle.net/10566/5928 | |
| dc.language.iso | en | en_US |
| dc.publisher | American Physical Society | en_US |
| dc.subject | Cosmological surveys | en_US |
| dc.subject | Lensing ratios | en_US |
| dc.subject | CMB lensing/galaxy counts | en_US |
| dc.subject | Galaxy shear/galaxy counts cross-correlations | en_US |
| dc.subject | Limber approximation | en_US |
| dc.title | Measuring lensing ratios with future cosmological surveys | en_US |
| dc.type | Article | en_US |