Euclid preparation: LXXXIV. The flat-sky approximation for the clustering of Euclid’s photometric galaxies

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dc.contributor.authorMatthewson, W. L.
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dc.contributor.authorConseil, S.
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dc.contributor.authorMartins, C. J. A. P.
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dc.contributor.authorMiluzio, M.
dc.contributor.authorMonaco, P.
dc.contributor.authorMoretti, C.
dc.contributor.authorMorgante, G.
dc.contributor.authorNadathur, S.
dc.contributor.authorNaidoo, K.
dc.contributor.authorNavarro-Alsina, A.
dc.contributor.authorNesseris, S.
dc.contributor.authorPaoletti, D.
dc.contributor.authorPassalacqua, F.
dc.contributor.authorPaterson, K.
dc.contributor.authorPatrizii, L.
dc.contributor.authorPisani, A.
dc.contributor.authorPotter, D.
dc.contributor.authorQuai, S.
dc.contributor.authorRadovich, M.
dc.contributor.authorRodighiero, G.
dc.contributor.authorSacquegna, S.
dc.contributor.authorSahlén, M.
dc.contributor.authorSanders, D. B.
dc.contributor.authorSarpa, E.
dc.contributor.authorSchneider, A.
dc.contributor.authorSciotti, D.
dc.contributor.authorSellentin, E.
dc.contributor.authorSilvestri, A.
dc.contributor.authorSmith, L. C.
dc.contributor.authorTanidis, K.
dc.contributor.authorTao, C.
dc.contributor.authorTestera, G.
dc.contributor.authorTeyssier, R.
dc.contributor.authorTosi, S.
dc.contributor.authorTroja, A.
dc.contributor.authorTucci, M.
dc.contributor.authorValieri, C.
dc.contributor.authorVenhola, A.
dc.contributor.authorVergani, D.
dc.contributor.authorVernizzi, F.
dc.contributor.authorVerza, G.
dc.contributor.authorWalton, N. A.
dc.contributor.authorEuclid Collaboration
dc.contributor.organizationfi=Tuorlan observatorio|en=Tuorla Observatory|
dc.contributor.organization-code1.2.246.10.2458963.20.90670098848
dc.converis.publication-id523436397
dc.converis.urlhttps://research.utu.fi/converis/portal/Publication/523436397
dc.date.accessioned2026-05-19T20:11:04Z
dc.description.abstractWe compared the performance of the flat-sky approximation and Limber approximation for the clustering analysis of the photometric galaxy catalogue of Euclid. We studied a 6-bin configuration, representing the first data release (DR1), and a 13-bin configuration, representing the third and final data release (DR3). We find that the Limber approximation is sufficiently accurate for the analysis of the wide bins of DR1. Instead, the 13 bins of DR3 cannot be modelled accurately with the Limber approximation. Instead, the flat-sky approximation is accurate to below 5% in recovering the angular power spectra of galaxy number counts in both cases and can be used to simplify the computation of the full power spectrum in harmonic space for the data analysis of DR3.
dc.identifier.eissn1432-0746
dc.identifier.jour-issn0004-6361
dc.identifier.urihttps://www.utupub.fi/handle/11111/60890
dc.identifier.urlhttps://doi.org/10.1051/0004-6361/202557773
dc.identifier.urnURN:NBN:fi-fe2026051949721
dc.language.isoen
dc.okm.affiliatedauthorKajava, Jari
dc.okm.discipline115 Astronomy and space scienceen_GB
dc.okm.discipline115 Avaruustieteet ja tähtitiedefi_FI
dc.okm.internationalcopublicationinternational co-publication
dc.okm.internationalityInternational publication
dc.okm.typeA1 ScientificArticle
dc.publisherEDP Sciences
dc.publisher.countryFranceen_GB
dc.publisher.countryRanskafi_FI
dc.publisher.country-codeFR
dc.relation.articlenumberA234
dc.relation.doi10.1051/0004-6361/202557773
dc.relation.ispartofjournalAstronomy and Astrophysics
dc.relation.volume707
dc.titleEuclid preparation: LXXXIV. The flat-sky approximation for the clustering of Euclid’s photometric galaxies
dc.year.issued2026

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