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Euclid preparation: XIX. Impact of magnification on photometric galaxy clustering

Lepori, F. and Tutusaus, I. and Viglione, C. and Bonvin, C. and Camera, S. and Castander, F. J. and Durrer, R. and Fosalba, P. and Jelic-Cizmek, G. and Kunz, M. and Adamek, J. and Casas, S. and Martinelli, M. and Sakr, Z. and Sapone, D. and Amara, A. and Auricchio, N. and Bodendorf, C. and Bonino, D. and Branchini, E. and Brescia, M. and Brinchmann, J. and Capobianco, V. and Carbone, C. and Carretero, J. and Castellano, M. and Cavuoti, S. and Cimatti, A. and Cledassou, R. and Congedo, G. and Conselice, C. J. and Conversi, L. and Copin, Y. and Corcione, L. and Courbin, F. and Da Silva, A. and Degaudenzi, H. and Douspis, M. and Dubath, F. and Dupac, X. and Dusini, S. and Ealet, A. and Farrens, S. and Ferriol, S. and Franceschi, E. and Fumana, M. and Garilli, B. and Gillard, W. and Gillis, B. and Giocoli, C. and Grazian, A. and Grupp, F. and Guzzo, L. and Haugan, S. V. H. and Holmes, W. and Hormuth, F. and Hudelot, P. and Jahnke, K. and Kermiche, S. and Kiessling, A. and Kilbinger, M. and Kitching, T. and Kümmel, M. and Kurki-Suonio, H. and Ligori, S. and Lilje, P. B. and Lloro, I. and Mansutti, O. and Marggraf, O. and Markovic, K. and Marulli, F. and Massey, R. and Maurogordato, S. and Melchior, M. and Meneghetti, M. and Merlin, E. and Meylan, G. and Moresco, M. and Moscardini, L. and Munari, E. and Nakajima, R. and Niemi, S. M. and Padilla, C. and Paltani, S. and Pasian, F. and Pedersen, K. and Percival, W. J. and Pettorino, V. and Pires, S. and Poncet, M. and Popa, L. and Pozzetti, L. and Raison, F. and Rhodes, J. and Roncarelli, M. and Rossetti, E. and Saglia, R. and Schneider, P. and Secroun, A. and Seidel, G. and Serrano, S. and Sirignano, C. and Sirri, G. and Stanco, L. and Starck, J.-L. and Tallada-Crespí, P. and Taylor, A. N. and Tereno, I. and Toledo-Moreo, R. and Torradeflot, F. and Valentijn, E. A. and Valenziano, L. and Wang, Y. and Weller, J. and Zamorani, G. and Zoubian, J. and Andreon, S. and Bardelli, S. and Fabbiano, G. and Graciá-Carpio, J. and Maino, D. and Medinaceli, E. and Mei, S. and Renzi, A. and Romelli, E. and Sureau, F. and Vassallo, T. and Zacchei, A. and Zucca, E. and Baccigalupi, C. and Balaguera-Antolínez, A. and Bernardeau, F. and Biviano, A. and Blanchard, A. and Bolzonella, M. and Borgani, S. and Bozzo, E. and Burigana, C. and Cabanac, R. and Cappi, A. and Carvalho, C. S. and Castignani, G. and Colodro-Conde, C. and Coupon, J. and Courtois, H. M. and Cuby, J.-G. and Davini, S. and de la Torre, S. and Di Ferdinando, D. and Farina, M. and Ferreira, P. G. and Finelli, F. and Galeotta, S. and Ganga, K. and García-Bellido, J. and Gaztanaga, E. and Gozaliasl, G. and Hook, I. M. and Ilić, S. and Joachimi, B. and Kansal, V. and Keihanen, E. and Kirkpatrick, C. C. and Lindholm, V. and Mainetti, G. and Maoli, R. and Martinet, N. and Maturi, M. and Metcalf, R. B. and Monaco, P. and Morgante, G. and Nightingale, J. and Nucita, A. and Patrizii, L. and Popa, V. and Potter, D. and Riccio, G. and Sánchez, A. G. and Schirmer, M. and Schultheis, M. and Scottez, V. and Sefusatti, E. and Tramacere, A. and Valiviita, J. and Viel, M. and Hildebrandt, H. (2022) Euclid preparation: XIX. Impact of magnification on photometric galaxy clustering. Astronomy and Astrophysics, 662 . Art. No. A93. ISSN 0004-6361. doi:10.1051/0004-6361/202142419.

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Aims. We investigate the importance of lensing magnification for estimates of galaxy clustering and its cross-correlation with shear for the photometric sample of Euclid. Using updated specifications, we study the impact of lensing magnification on the constraints and the shift in the estimation of the best fitting cosmological parameters that we expect if this effect is neglected. Methods. We follow the prescriptions of the official Euclid Fisher matrix forecast for the photometric galaxy clustering analysis and the combination of photometric clustering and cosmic shear. The slope of the luminosity function (local count slope), which regulates the amplitude of the lensing magnification, and the galaxy bias have been estimated from the Euclid Flagship simulation. Results. We find that magnification significantly affects both the best-fit estimation of cosmological parameters and the constraints in the galaxy clustering analysis of the photometric sample. In particular, including magnification in the analysis reduces the 1σ errors on Ωₘ,₀, w₀, wₐ at the level of 20–35%, depending on how well we will be able to independently measure the local count slope. In addition, we find that neglecting magnification in the clustering analysis leads to shifts of up to 1.6σ in the best-fit parameters. In the joint analysis of galaxy clustering, cosmic shear, and galaxy–galaxy lensing, magnification does not improve precision, but it leads to an up to 6σ bias if neglected. Therefore, for all models considered in this work, magnification has to be included in the analysis of galaxy clustering and its cross-correlation with the shear signal (3 × 2pt analysis) for an accurate parameter estimation.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Tutusaus, I.0000-0002-3199-0399
Camera, S.0000-0003-3399-3574
Castander, F. J.0000-0001-7316-4573
Fosalba, P.0000-0002-1510-5214
Kunz, M.0000-0003-1676-6126
Sapone, D.0000-0001-7089-4503
Auricchio, N.0000-0003-4444-8651
Bonino, D.0000-0002-3336-9977
Branchini, E.0000-0002-0808-6908
Brescia, M.0000-0001-9506-5680
Brinchmann, J.0000-0003-4359-8797
Capobianco, V.0000-0002-3309-7692
Carretero, J.0000-0002-3130-0204
Castellano, M.0000-0001-9875-8263
Cavuoti, S.0000-0002-3787-4196
Cimatti, A.0000-0002-4409-5633
Cledassou, R.0000-0002-8313-2230
Congedo, G.0000-0003-2508-0046
Conselice, C. J.0000-0003-1949-7638
Conversi, L.0000-0002-6710-8476
Copin, Y.0000-0002-5317-7518
Corcione, L.0000-0002-6497-5881
Dusini, S.0000-0002-1128-0664
Farrens, S.0000-0002-9594-9387
Franceschi, E.0000-0002-0585-6591
Garilli, B.0000-0001-7455-8750
Gillard, W.0000-0003-4744-9748
Gillis, B.0000-0002-4478-1270
Giocoli, C.0000-0002-9590-7961
Jahnke, K.0000-0003-3804-2137
Kermiche, S.0000-0002-0302-5735
Kilbinger, M.0000-0001-9513-7138
Kitching, T.0000-0002-4061-4598
Kurki-Suonio, H.0000-0002-4618-3063
Ligori, S.0000-0003-4172-4606
Lloro, I.0000-0001-5966-1434
Mansutti, O.0000-0001-5758-4658
Marggraf, O.0000-0001-7242-3852
Marulli, F.0000-0002-8850-0303
Massey, R.0000-0002-6085-3780
Meneghetti, M.0000-0003-1225-7084
Merlin, E.0000-0001-6870-8900
Moresco, M.0000-0002-7616-7136
Moscardini, L.0000-0002-3473-6716
Padilla, C.0000-0001-7951-0166
Paltani, S.0000-0002-8108-9179
Percival, W. J.0000-0002-0644-5727
Pettorino, V.0000-0002-4203-9320
Pires, S.0000-0002-0249-2104
Pozzetti, L.0000-0001-7085-0412
Rhodes, J.0000-0002-4485-8549
Roncarelli, M.0000-0001-9587-7822
Saglia, R.0000-0003-0378-7032
Schneider, P.0000-0002-5094-2245
Secroun, A.0000-0003-0505-3710
Serrano, S.0000-0002-0211-2861
Tereno, I.0000-0002-4537-6218
Toledo-Moreo, R.0000-0002-2997-4859
Valentijn, E. A.0000-0003-1032-6680
Valenziano, L.0000-0002-1170-0104
Wang, Y.0000-0002-4749-2984
Weller, J.0000-0002-8282-2010
Zamorani, G.0000-0002-2318-301X
Andreon, S.0000-0002-2041-8784
Bardelli, S.0000-0002-8900-0298
Fabbiano, G.0000-0002-3554-3318
Graciá-Carpio, J.0000-0003-4689-3134
Maino, D.0000-0002-4761-1242
Medinaceli, E.0000-0002-4040-7783
Mei, S.0000-0002-2849-559X
Romelli, E.0000-0003-3069-9222
Zacchei, A.0000-0003-0396-1192
Zucca, E.0000-0002-5845-8132
Baccigalupi, C.0000-0002-8211-1630
Balaguera-Antolínez, A.0000-0001-5028-3035
Biviano, A.0000-0002-0857-0732
Bozzo, E.0000-0002-7504-7423
Burigana, C.0000-0002-3005-5796
Cabanac, R.0000-0001-6679-2600
Cappi, A.0000-0002-9200-7167
Castignani, G.0000-0001-6831-0687
Courtois, H. M.0000-0003-0509-1776
Cuby, J.-G.0000-0002-8767-1442
de la Torre, S.0000-0002-0839-2884
Finelli, F.0000-0002-6694-3269
Galeotta, S.0000-0002-3748-5115
García-Bellido, J.0000-0002-9370-8360
Gaztanaga, E.0000-0001-9632-0815
Gozaliasl, G.0000-0002-0236-919X
Hook, I. M.0000-0002-2960-978X
Keihanen, E.0000-0003-1804-7715
Martinet, N.0000-0003-2786-7790
Nightingale, J.0000-0002-8987-7401
Nucita, A.0000-0002-7926-3481
Patrizii, L.0000-0002-9712-977X
Riccio, G.0000-0001-7020-1172
Sánchez, A. G.0000-0003-1198-831X
Schirmer, M.0000-0003-2568-9994
Schultheis, M.0000-0002-6590-1657
Tramacere, A.0000-0002-8186-3793
Valiviita, J.0000-0001-6225-3693
Viel, M.0000-0002-2642-5707
Additional Information:© ESO 2022. Received: 12 October 2021 Accepted: 24 January 2022. C.B., R.D., G.J., M.K., J.A. and F.L. acknowledge support from the Swiss National Science Foundation. C.B. acknowledges funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant agreement No. 863929; project title “Testing the law of gravity with novel large-scale structure observables”). I.T. acknowledges support from the Spanish Ministry of Science, Innovation and Universities through grant ESP2017-89838, and the H2020 programme of the European Commission through grant 776247. S.C. acknowledges support from the ‘Departments of Excellence 2018-2022’ Grant (L. 232/2016) awarded by the Italian Ministry of University and Research (MUR). The Euclid Consortium acknowledges the European Space Agency and a number of agencies and institutes that have supported the development of Euclid, in particular the Academy of Finland, the Agenzia Spaziale Italiana, the Belgian Science Policy, the Canadian Euclid Consortium, the French Centre National d’Etudes Spatiales, the Deutsches Zentrum für Luft- und Raumfahrt, the Danish Space Research Institute, the Fundação para a Ciência e a Tecnologia, the Ministerio de Economia y Competitividad, the National Aeronautics and Space Administration, the National Astronomical Observatory of Japan, the Netherlandse Onderzoekschool Voor Astronomie, the Norwegian Space Agency, the Romanian Space Agency, the State Secretariat for Education, Research and Innovation (SERI) at the Swiss Space Office (SSO), and the United Kingdom Space Agency. A complete and detailed list is available on the Euclid web site (
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Swiss National Science Foundation (SNSF)UNSPECIFIED
European Research Council (ERC)863929
Ministerio de Ciencia, Innovación y Universidades (MICIU)ESP2017-89838
European Research Council (ERC)776247
Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR)L. 232/2016
European Space Agency (ESA)UNSPECIFIED
Academy of FinlandUNSPECIFIED
Agenzia Spaziale Italiana (ASI)UNSPECIFIED
Belgian Federal Science Policy Office (BELSPO)UNSPECIFIED
Canadian Euclid ConsortiumUNSPECIFIED
Centre National d'Études Spatiales (CNES)UNSPECIFIED
Deutsches Zentrum für Luft- und Raumfahrt (DLR)UNSPECIFIED
Danish Space Research InstituteUNSPECIFIED
Fundação para a Ciência e a Tecnologia (FCT)UNSPECIFIED
Ministerio de Economia y Competitividad (MINECO)UNSPECIFIED
National Astronomical Observatory of JapanUNSPECIFIED
Nederlandse Onderzoekschool voor de Astronomie (NOVA)UNSPECIFIED
Norwegian Research CouncilUNSPECIFIED
Romanian Space AgencyUNSPECIFIED
Swiss Space Office (SSO)UNSPECIFIED
United Kingdom Space Agency (UKSA)UNSPECIFIED
Subject Keywords:large-scale structure of Universe / cosmological parameters / cosmology: theory
Record Number:CaltechAUTHORS:20220721-8407000
Persistent URL:
Official Citation:Euclid preparation - XIX. Impact of magnification on photometric galaxy clustering Euclid Collaboration, F. Lepori, I. Tutusaus, C. Viglione, C. Bonvin, S. Camera, F. J. Castander, R. Durrer, P. Fosalba, G. Jelic-Cizmek, M. Kunz, J. Adamek, S. Casas, M. Martinelli, Z. Sakr, D. Sapone, A. Amara, N. Auricchio, C. Bodendorf, D. Bonino, E. Branchini, M. Brescia, J. Brinchmann, V. Capobianco, C. Carbone, J. Carretero, M. Castellano, S. Cavuoti, A. Cimatti, R. Cledassou, G. Congedo, C. J. Conselice, L. Conversi, Y. Copin, L. Corcione, F. Courbin, A. Da Silva, H. Degaudenzi, M. Douspis, F. Dubath, X. Dupac, S. Dusini, A. Ealet, S. Farrens, S. Ferriol, E. Franceschi, M. Fumana, B. Garilli, W. Gillard, B. Gillis, C. Giocoli, A. Grazian, F. Grupp, L. Guzzo, S. V. H. Haugan, W. Holmes, F. Hormuth, P. Hudelot, K. Jahnke, S. Kermiche, A. Kiessling, M. Kilbinger, T. Kitching, M. Kümmel, H. Kurki-Suonio, S. Ligori, P. B. Lilje, I. Lloro, O. Mansutti, O. Marggraf, K. Markovic, F. Marulli, R. Massey, S. Maurogordato, M. Melchior, M. Meneghetti, E. Merlin, G. Meylan, M. Moresco, L. Moscardini, E. Munari, R. Nakajima, S. M. Niemi, C. Padilla, S. Paltani, F. Pasian, K. Pedersen, W. J. Percival, V. Pettorino, S. Pires, M. Poncet, L. Popa, L. Pozzetti, F. Raison, J. Rhodes, M. Roncarelli, E. Rossetti, R. Saglia, P. Schneider, A. Secroun, G. Seidel, S. Serrano, C. Sirignano, G. Sirri, L. Stanco, J.-L. Starck, P. Tallada-Crespí, A. N. Taylor, I. Tereno, R. Toledo-Moreo, F. Torradeflot, E. A. Valentijn, L. Valenziano, Y. Wang, J. Weller, G. Zamorani, J. Zoubian, S. Andreon, S. Bardelli, G. Fabbian, J. Graciá-Carpio, D. Maino, E. Medinaceli, S. Mei, A. Renzi, E. Romelli, F. Sureau, T. Vassallo, A. Zacchei, E. Zucca, C. Baccigalupi, A. Balaguera-Antolínez, F. Bernardeau, A. Biviano, A. Blanchard, M. Bolzonella, S. Borgani, E. Bozzo, C. Burigana, R. Cabanac, A. Cappi, C. S. Carvalho, G. Castignani, C. Colodro-Conde, J. Coupon, H. M. Courtois, J.-G. Cuby, S. Davini, S. de la Torre, D. Di Ferdinando, M. Farina, P. G. Ferreira, F. Finelli, S. Galeotta, K. Ganga, J. Garcia-Bellido, E. Gaztanaga, G. Gozaliasl, I. M. Hook, S. Ilić, B. Joachimi, V. Kansal, E. Keihanen, C. C. Kirkpatrick, V. Lindholm, G. Mainetti, R. Maoli, N. Martinet, M. Maturi, R. B. Metcalf, P. Monaco, G. Morgante, J. Nightingale, A. Nucita, L. Patrizii, V. Popa, D. Potter, G. Riccio, A. G. Sánchez, M. Schirmer, M. Schultheis, V. Scottez, E. Sefusatti, A. Tramacere, J. Valiviita, M. Viel and H. Hildebrandt A&A, 662 (2022) A93 DOI:
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ID Code:115735
Deposited By: George Porter
Deposited On:22 Jul 2022 21:38
Last Modified:22 Jul 2022 21:38

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