<i>Euclid</i> preparation

Measurements of galaxy clustering are affected by redshift-space distortions (RSDs). Peculiar velocities, gravitational lensing, and other light-cone projection effects modify the observed redshifts, fluxes, and sky positions of distant light sources. We determined which of these effects leave a detectable imprint on several two-point clustering statistics to be extracted from the Euclid wide spectroscopic survey (EWSS) on large scales. We generated 140 mock galaxy catalogues with the survey geometry and selection function of the EWSS and made use of the LIGER (LIght cones with GEneral Relativity) method to account for a variable number of relativistic RSDs to linear order in the cosmological perturbations. We estimated different two-point clustering statistics from the mocks and used the likelihood-ratio test to calculate the statistical significance with which the EWSS could reject the null hypothesis that certain relativistic projection effects can be neglected in the theoretical models. We find that the combined effects of lensing magnification and convergence imprint characteristic signatures on several clustering observables. Their signal-to-noise ratio (S/N) ranges between 2.5 and 6 (depending on the adopted summary statistic) for the highest-redshift galaxies in the EWSS. The corresponding feature due to the peculiar velocity of the Sun is measured with a S/N of order one or two. The multipoles of the power spectrum from the catalogues that include all relativistic effects reject the null hypothesis that RSDs are only generated by the variation in the peculiar velocity along the line of sight with a significance of 2.9 standard deviations. As a by-product of our study, we demonstrate that the mixing-matrix formalism to model finite-volume effects in the multipole moments of the power spectrum can be robustly applied to surveys made of several disconnected patches. Our results indicate that relativistic RSDs, in particular the contribution from weak gravitational lensing, cannot be disregarded when modelling two-point clustering statistics extracted from the EWSS.

Authors

Publication Details

Journal
Astronomy and Astrophysics
Published
2025-03-14
DOI
https://doi.org/10.1051/0004-6361/202452480
Citations
2
Primary Topic
Methane Hydrates and Related Phenomena
Type
article
Field-Weighted Citation Impact
1.72

Funders

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article

Euclid preparation

M Viel, C. Baccigalupi, E. Sefusatti, G. Seidel et al.
2 citations
Astronomy and Astrophysics
Methane Hydrates and Related Phenomena
1.72
article

Euclid preparation

M Viel, C. Baccigalupi, E. Sefusatti, G. Seidel, P. G'omez-Alvarez, M. Calabrese, G. Riccio, M. Douspis, Y. Mellier, M. Schirmer, M. Brescia, A. Secroun, I. Ferrero, A. Boucaud, A. Blanchard, M. Scodeggio, E. Gaztanaga, S Bardelli, J. Steinwagner, Matthew Shetrone, C. Surace, J. García-Bellido, A.G Ferrari, K. Markovic, H Hildebrandt, S. Di Domizio, N. Mauri, C. Giocoli, G. Sikkema, F. Courbin, M. Migliaccio, F. Torradeflot, I. Lloro, Y. Copin, Alex D. Hall, J. Rhodes, Santiago Casas, A. Díaz‐Sánchez, E Maiorano, J.J Diaz, S Nadathur, W. Holmes, G. Desprez, Daniele Bertacca, Claudio Moretti, C.J.A.P. Martins, F. Marulli, V. Capobianco, J Hjorth, T. Schrabback, L. Gabarra, M. Magliocchetti, J Le Graet, Sitao Mei, S. V. H. Haugan, R. Massey, S. Paltani, K Ganga, T. Vassallo, L. Valenziano, A Troja, B. Joachimi, G. Castignani, I. Tutusaus, R. Toledo-Moreo, S Bruton, M. Moresco, K Pedersen, A. Cimatti, W.G. Hartley, L Stanco, D. Sapone, A. Da Silva, M. Castellano, G. Testera, F. Lacasa, C. Colodro-Conde, A. Kiessling, N Auricchio, A. Cappi, N Tessore, M Ballardini, E. Romelli, A. M. Di Giorgio, Christopher J. Conselice, J. Weller, P. Reimberg, O. Mansutti, P. Fosalba, S. Davini, L.A Popa, I Risso, L. Moscardini, V. Allevato, P. Tallada-Crespí, C Sirignano, H. Böhringer, J. Carretero, E. Zucca, P. Monaco, M Tenti, D. Karagiannis, S. Escoffier, J Brinchmann, L Blot, D. Potter, M Sahlén, C. Kirkpatrick, M. Kümmel, R. B. Metcalf, S Ferriol, F. Fornari, A. Hornstrup, F Pasian, O. Marggraf, L. Conversi, V.F Cardone, A Calabrò, C. Tao, P. Schneider, M. Pöntinen, R. B. Metcalf, G. Meylan, R. Teyssier, E. Medinaceli, K. Jahnkę, F. Hormuth, M. Farina, S. Camera, F. Mannucci, M Jhabvala, S. Galeotta, L. Guzzo, R. Saglia, C.A.J Duncan, V. Kansal, S Anselmi, H Kurki-Suonio, S Borgani, S. Ligori, R. Farinelli, F. Giacomini, C. Valieri, H. Degaudenzi, F. Raison, A. Balaguera-Antolínez, A. Biviano, E. Franceschi, B. Gillis, T Castro, S. Farrens, M. Sereno, M. Kilbinger, G Cañas-Herrera, J. Gracia-Carpio, C. Porciani, Z. Sakr, F. Dubath, K Tanidis, L. Legrand, E. Bozzo, V. Pettorino, Asantha Cooray, K. C. Chambers, J. Dinis, V. Lindholm, D. Bonino, P.-F Rocci, V. Popa, A Grazian, E. Keihänen, E Branchini, P Vielzeuf, G. Gozaliasl, S. Cavuoti, M.Y Elkhashab, M. Frailis, A. Spurio Mancini, P. Bergamini, P. Šimon, G Sirri, D. Vergani, A. Renzi, C. Carbone, S. Serrano, F. Grupp, S. Kermiche, Arthur Loureiro, S Dusini, M. Roncarelli, Sune Toft, R. Cabanac, P. B. Lilje, L. Patrizii, M. Poncet, A. Fontana, N. Martinet, A Veropalumbo, C.S. Carvalho, A Pezzotta, Brian De, C. Burigana, C. Bodendorf, G. Mainetti, L. Pozzetti, C. Padilla, V. Scottez, Y. Akrami, H. M. Courtois, G. Polenta, A. Jimenez Mu noz, J. Salvalaggio, Yun Wang, S. Tosi, Pedro G. Ferreira, L. Maurin, J.E. Kajava, Alessandra Silvestri, F. Finelli, M Kunz, M. Baldi, T. Kitching, S. Pires, N. Aghanim, G Maggio, A Amara, I. Tereno, R. Rebolo, A. Schneider, F. Vernizzi, M. Wiesmann, A.N Taylor, C. Hernández-Monteagudo, J.A. Escartin Vigo, D. Di Ferdinando, B. Kubik, S. Andreon, Y. Ascasíbar, J Valiviita, X. Dupac, M Tucci, R. Casas, G Verza, H. Dole, K Kuijken, G. Morgante, F. Gianotti, S.-M. Niemi, A.G. S'anchez, S. de la Torre, A Finoguenov, A. Nicholas Walton, G. Congedo
article en
2 citations

Abstract

Measurements of galaxy clustering are affected by redshift-space distortions (RSDs). Peculiar velocities, gravitational lensing, and other light-cone projection effects modify the observed redshifts, fluxes, and sky positions of distant light sources. We determined which of these effects leave a detectable imprint on several two-point clustering statistics to be extracted from the Euclid wide spectroscopic survey (EWSS) on large scales. We generated 140 mock galaxy catalogues with the survey geometry and selection function of the EWSS and made use of the LIGER (LIght cones with GEneral Relativity) method to account for a variable number of relativistic RSDs to linear order in the cosmological perturbations. We estimated different two-point clustering statistics from the mocks and used the likelihood-ratio test to calculate the statistical significance with which the EWSS could reject the null hypothesis that certain relativistic projection effects can be neglected in the theoretical models. We find that the combined effects of lensing magnification and convergence imprint characteristic signatures on several clustering observables. Their signal-to-noise ratio (S/N) ranges between 2.5 and 6 (depending on the adopted summary statistic) for the highest-redshift galaxies in the EWSS. The corresponding feature due to the peculiar velocity of the Sun is measured with a S/N of order one or two. The multipoles of the power spectrum from the catalogues that include all relativistic effects reject the null hypothesis that RSDs are only generated by the variation in the peculiar velocity along the line of sight with a significance of 2.9 standard deviations. As a by-product of our study, we demonstrate that the mixing-matrix formalism to model finite-volume effects in the multipole moments of the power spectrum can be robustly applied to surveys made of several disconnected patches. Our results indicate that relativistic RSDs, in particular the contribution from weak gravitational lensing, cannot be disregarded when modelling two-point clustering statistics extracted from the EWSS.

Astronomy and AstrophysicsVol. 697
National Aeronautics and Space Administration, California Institute of Technology, Aix-Marseille Université, Helsingin Yliopisto, Ministerio de Ciencia, Innovación y Universidades, Universidad de La Laguna, Dipartimenti di Eccellenza, European Space Agency, Durham University, Universität Heidelberg, Rijksuniversiteit Groningen, Centre National d’Etudes Spatiales, Ministero dell’Istruzione, dell’Università e della Ricerca, Magyar Tudományos Akadémia, Agenzia Spaziale Italiana, Università degli Studi di Genova, Université de Toulouse, Centre National de la Recherche Scientifique, Universidad Politécnica de Cartagena, Universidade de Lisboa, Universidad de Chile, Università di Bologna, National Astronomical Observatory of Japan, Agenția Spațială Română, Universität Innsbruck, Sorbonne Université, Norsk Romsenter, Institut de Física d'Altes Energies, Fundação para a Ciência e a Tecnologia, Facultad de Ciencias Físicas y Matemáticas, Institut National de Physique Nucléaire et de Physique des Particules
Openalex Percentile: Top 19%
Methane Hydrates and Related Phenomena
1.72
DOIOpen Access PDFOpenAlex
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