Euclid preparation : XI. Mean redshift determination from galaxy redshift probabilities for cosmic shear tomography

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dc.contributor.author Euclid Collaboration
dc.contributor.author Ilbert, O.
dc.contributor.author Gozaliasl, G.
dc.contributor.author Keihänen, E.
dc.contributor.author Kurki-Suonio, H.
dc.contributor.author Väliviita, J.
dc.contributor.author Kirkpatrick , C. C.
dc.date.accessioned 2021-05-05T12:50:01Z
dc.date.available 2021-05-05T12:50:01Z
dc.date.issued 2021-03-18
dc.identifier.citation Euclid Collaboration , Ilbert , O , Gozaliasl , G , Keihänen , E , Kurki-Suonio , H , Väliviita , J & Kirkpatrick , C C 2021 , ' Euclid preparation : XI. Mean redshift determination from galaxy redshift probabilities for cosmic shear tomography ' , Astronomy & Astrophysics , vol. 647 , A117 . https://doi.org/10.1051/0004-6361/202040237
dc.identifier.other PURE: 162979707
dc.identifier.other PURE UUID: 91467ad0-53fe-4b5c-bda6-e0a07f8b09e0
dc.identifier.other WOS: 000630371500003
dc.identifier.other ORCID: /0000-0002-4618-3063/work/93368358
dc.identifier.other ORCID: /0000-0001-6225-3693/work/93369383
dc.identifier.other ORCID: /0000-0003-1804-7715/work/93370692
dc.identifier.other Scopus: 85103132302
dc.identifier.uri http://hdl.handle.net/10138/329661
dc.description.abstract The analysis of weak gravitational lensing in wide-field imaging surveys is considered to be a major cosmological probe of dark energy. Our capacity to constrain the dark energy equation of state relies on an accurate knowledge of the galaxy mean redshift z. We investigate the possibility of measuring z with an accuracy better than 0.002 (1+z) in ten tomographic bins spanning the redshift interval 0.2 99.8%. The zPDF approach can also be successful if the zPDF is de-biased using a spectroscopic training sample. This approach requires deep imaging data but is weakly sensitive to spectroscopic redshift failures in the training sample. We improve the de-biasing method and confirm our finding by applying it to real-world weak-lensing datasets (COSMOS and KiDS+VIKING-450). en
dc.format.extent 21
dc.language.iso eng
dc.relation.ispartof Astronomy & Astrophysics
dc.rights unspecified
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject dark energy
dc.subject galaxies: distances and redshifts
dc.subject methods: statistical
dc.subject PHOTOMETRIC REDSHIFTS
dc.subject DISTRIBUTIONS
dc.subject PERFORMANCE
dc.subject SIMULATION
dc.subject RESOLUTION
dc.subject EVOLUTION
dc.subject UNIVERSE
dc.subject STELLAR
dc.subject IMPACT
dc.subject 115 Astronomy, Space science
dc.title Euclid preparation : XI. Mean redshift determination from galaxy redshift probabilities for cosmic shear tomography en
dc.type Article
dc.contributor.organization Department of Physics
dc.contributor.organization Research Program in Systems Oncology
dc.contributor.organization Helsinki Institute of Physics
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1051/0004-6361/202040237
dc.relation.issn 0004-6361
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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