<i>Euclid</i>: Relativistic effects in the dipole of the two-point correlation function

Gravitational redshift and Doppler effects give rise to an antisymmetric component of the galaxy correlation function when cross-correlating two galaxy populations or two different tracers. In this paper, we assess the detectability of these effects in the Euclid spectroscopic galaxy survey. We model the impact of gravitational redshift on the observed redshift of galaxies in the Flagship mock catalogue using a Navarro–Frenk–White profile for the host haloes. We isolate these relativistic effects, largely subdominant in the standard analysis, by splitting the galaxy catalogue into two populations of faint and bright objects and estimating the dipole of their cross-correlation in four redshift bins. In the simulated catalogue, we detect the dipole signal on scales below 30 h −1 Mpc, with detection significances of 4 σ and 3 σ in the two lowest redshift bins, respectively. At higher redshifts, the detection significance drops below 2 σ . Overall, we estimate the total detection significance in the Euclid spectroscopic sample to be approximately 6 σ . We find that on small scales, the major contribution to the signal comes from the nonlinear gravitational potential. Our study on the Flagship mock catalogue shows that this observable can be detected in Euclid Data Release 2 and beyond.

Authors

Publication Details

Journal
Astronomy and Astrophysics
Published
2025-01-22
DOI
https://doi.org/10.1051/0004-6361/202452531
Citations
3
Primary Topic
Quantum and Classical Electrodynamics
Type
article
Field-Weighted Citation Impact
3.74

Funders

Controls
|||
ALL TIME
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
article

Euclid: Relativistic effects in the dipole of the two-point correlation function

M. Brescia, M. Martinelli, A. Cimatti, I Tereno et al.
3 citations
Astronomy and Astrophysics
Quantum and Classical Electrodynamics
3.74
article

Euclid: Relativistic effects in the dipole of the two-point correlation function

M. Brescia, M. Martinelli, A. Cimatti, I Tereno, G. Sirri, L. Amendola, C. Padilla, J. Steinwagner, Leroy ten Dam, K. Markovic, O. Marggraf, Francesca Lepori, P Fosalba, Satoshi Saga, Y. Copin, M. Viel, F. Grupp, M. Melchior, F. Marulli, V. Capobianco, C. Baccigalupi, T. Schrabback, E. Zucca, M. Schirmer, S. Cavuoti, S. V. H. Haugan, R. Massey, T. Vassallo, C. Colodro-Conde, S. Dusini, R. Toledo-Moreo, M. Moresco, J. Brinchmann, R. Saglia, G. De Lucia, D. Sapone, F Dubath, Camille Bonvin, S. Ilić, J. Carretero, A. Caillat, E. Romelli, L Stanco, O. Mansutti, L. Moscardini, G. Fabbian, C Sirignano, C. Neissner, M. Baldi, M. Kilbinger, S. Ferriol, H. Degaudenzi, E. Maiorano, A. Hornstrup, E. Rossetti, E. Medinaceli, E. Branchini, V. Pettorino, M. Farina, S. Camera, M Jhabvala, S. Galeotta, C.A.J Duncan, C. Viglione, S Paltani, J. Rhodes, J. Weller, F. Raison, E. Franceschi, F. Pasian, K Jahnke, A. Kiessling, N. Martinet, A Secroun, C. Giocoli, Y. Wang, G. Congedo, Michel-Andrès Breton, D. Bonino, V. Lindholm, G. Castignani, E. Keihänen, B. Sartoris, B Gillis, P. Schneider, P. Bergamini, Z. Sakr, G. Seidel, C. Carbone, J. M. Diego, M. Castellano, Y. Mellier, P. B. Lilje, F. Torradeflot, S. Serrano, A Pezzotta, Sebastian Schulz, C. Burigana, M. Frailis, Julian Adamek, H. M. Courtois, G. Polenta, S Andreon, i, G. Riccio, M Kunz, F. Finelli, G. Meylan, L. Valenziano, W. Holmes, I. Lloro, S. Farrens, L. A. Popa, A Renzi, A. Grazian, K. Pedersen, S Bardelli, E. Merlin, I Tutusaus, F. Courbin, V. Scottez, H. Kurki‐Suonio, F. Hormuth, S. Pires, L. Conversi, M. Poncet, B. Kubik, C. Rosset, M. Roncarelli, S. Casas, S.-M. Niemi, A.G. S'anchez, S Ligori
article en
3 citations

Abstract

Gravitational redshift and Doppler effects give rise to an antisymmetric component of the galaxy correlation function when cross-correlating two galaxy populations or two different tracers. In this paper, we assess the detectability of these effects in the Euclid spectroscopic galaxy survey. We model the impact of gravitational redshift on the observed redshift of galaxies in the Flagship mock catalogue using a Navarro–Frenk–White profile for the host haloes. We isolate these relativistic effects, largely subdominant in the standard analysis, by splitting the galaxy catalogue into two populations of faint and bright objects and estimating the dipole of their cross-correlation in four redshift bins. In the simulated catalogue, we detect the dipole signal on scales below 30 h −1 Mpc, with detection significances of 4 σ and 3 σ in the two lowest redshift bins, respectively. At higher redshifts, the detection significance drops below 2 σ . Overall, we estimate the total detection significance in the Euclid spectroscopic sample to be approximately 6 σ . We find that on small scales, the major contribution to the signal comes from the nonlinear gravitational potential. Our study on the Flagship mock catalogue shows that this observable can be detected in Euclid Data Release 2 and beyond.

Astronomy and AstrophysicsVol. 694
Science and Technology Facilities Council
Openalex Percentile: Top 9%
Quantum and Classical Electrodynamics
3.74
DOIOpen Access PDFOpenAlex
AI Navigator

Ask Laika to Summarize, Analyze, and Connect papers live on the map.

Summarize Papers & Methodologies

Extract key findings, datasets, and comparative methods across publications.

Benchmark Rankings & Visual Analytics

Rank top research institutions, authors, funders, topics, and journals by Field-Weighted Citation Impact (FWCI) and paper volume with instant charts.

Connect Distant Disciplines

Bridge topological clusters on the map to find hidden collaborative intersections.