Euclid. Populating a dark universe with galaxies using SciPIC
Abstract
High-fidelity galaxy mocks are crucial for validating analysis pipelines and for cosmological inference. In this context, the Science Pipeline at PIC (SciPIC) is a pipeline specifically designed for the fast generation of synthetic galaxy catalogues from the halo properties identified in cosmological simulations. SciPIC delivers galaxy catalogues that aim to reproduce the observed luminosity function and clustering above a given flux detection limit over a wide redshift range. In this work, we introduce SciPICal, an automated pipeline that calibrates the parameters that set the main mock galaxy properties, namely number density, luminosities, colours, and positions. The pipeline is applied to the Euclid Flagship 2 Wide and Deep halo catalogues, specifically built to support the \textit{Euclid} wide and deep surveys. Compared to the recently released Flagship 2 Wide mock, our calibrated version improves the clustering predictions by approximately 50\% based on chi-squared values. Furthermore, we produce the Euclid Deep mock catalogue, which reaches up to by populating a light-cone and a complementary snapshot at . We validate these catalogues using measurements from spectroscopic and photometric galaxy surveys, as well as with results from a hydrodynamical simulation. The obtained good agreement (within for most of the samples) in the clustering predictions across the different galaxy samples considered, validates our calibration strategy and demonstrates the strong predictive power of the generated mocks. This pipeline will allow us to improve the methodology applied in assigning the galaxy properties and ensures that the galaxy mocks remain up-to-date by incorporating constraints from upcoming observational data in the calibration procedure.
Cite
@article{arxiv.2604.14802,
title = {Euclid. Populating a dark universe with galaxies using SciPIC},
author = {Euclid Collaboration and E. J. Gonzalez and J. Carretero and Z. Baghkhani and F. J. Castander and P. Fosalba and P. Tallada-Crespí and J. Stadel and D. Potter and I. Tutusaus and S. Ramakrishnan and M. L. van Heukelum and N. E. Chisari and F. Marulli and M. Bolzonella and L. Pozzetti and D. Navarro-Gironés and J. Chaves-Montero and G. Parimbelli and M. Manera and L. Blot and K. Hoffmann and M. Huertas-Company and P. Monaco and C. Scarlata and M. -A. Breton and S. -S. Li and R. Teyssier and M. Crocce and G. Congedo and A. Biviano and M. Hirschmann and A. Pezzotta and H. Hoekstra and W. J. Percival and P. A. Oesch and R. A. A. Bowler and V. Gonzalez-Perez and S. Avila and A. Kovács and B. Altieri and S. Andreon and N. Auricchio and C. Baccigalupi and M. Baldi and S. Bardelli and P. Battaglia and E. Branchini and M. Brescia and S. Camera and V. Capobianco and C. Carbone and S. Casas and M. Castellano and G. Castignani and S. Cavuoti and A. Cimatti and C. Colodro-Conde and L. Conversi and Y. Copin and F. Courbin and H. M. Courtois and H. Degaudenzi and S. de la Torre and G. De Lucia and H. Dole and F. Dubath and X. Dupac and S. Escoffier and M. Farina and R. Farinelli and S. Farrens and F. Faustini and S. Ferriol and F. Finelli and S. Fotopoulou and N. Fourmanoit and M. Frailis and E. Franceschi and M. Fumana and S. Galeotta and K. George and B. Gillis and C. Giocoli and J. Gracia-Carpio and A. Grazian and F. Grupp and L. Guzzo and S. V. H. Haugan and W. Holmes and F. Hormuth and A. Hornstrup and K. Jahnke and M. Jhabvala and B. Joachimi and S. Kermiche and A. Kiessling and B. Kubik and M. Kümmel and M. Kunz and H. Kurki-Suonio and A. M. C. Le Brun and S. Ligori and P. B. Lilje and V. Lindholm and I. Lloro and G. Mainetti and O. Mansutti and O. Marggraf and M. Martinelli and N. Martinet and R. J. Massey and E. Medinaceli and S. Mei and M. Meneghetti and E. Merlin and G. Meylan and A. Mora and M. Moresco and L. Moscardini and R. Nakajima and C. Neissner and S. -M. Niemi and J. W. Nightingale and C. Padilla and S. Paltani and F. Pasian and K. Pedersen and V. Pettorino and S. Pires and G. Polenta and L. A. Popa and F. Raison and A. Renzi and J. Rhodes and G. Riccio and E. Romelli and M. Roncarelli and R. Saglia and Z. Sakr and A. G. Sánchez and D. Sapone and B. Sartoris and P. Schneider and T. Schrabback and A. Secroun and S. Serrano and E. Sihvola and P. Simon and C. Sirignano and G. Sirri and A. Spurio Mancini and L. Stanco and A. N. Taylor and I. Tereno and S. Toft and R. Toledo-Moreo and F. Torradeflot and J. Valiviita and T. Vassallo and G. Verdoes Kleijn and Y. Wang and J. Weller and G. Zamorani and F. M. Zerbi and E. Zucca and V. Allevato and M. Ballardini and C. Burigana and R. Cabanac and M. Calabrese and A. Cappi and T. Castro and J. A. Escartin Vigo and L. Gabarra and J. García-Bellido and J. Macias-Perez and R. Maoli and J. Martín-Fleitas and N. Mauri and R. B. Metcalf and A. Montoro and A. A. Nucita and M. Pöntinen and V. Scottez and M. Sereno and M. Tenti and M. Tucci and M. Viel and M. Wiesmann and Y. Akrami and I. T. Andika and G. Angora and S. Anselmi and M. Archidiacono and F. Atrio-Barandela and L. Bazzanini and J. Bel and D. Bertacca and M. Bethermin and F. Beutler and A. Blanchard and M. Bonici and M. L. Brown and S. Bruton and A. Calabro and B. Camacho Quevedo and F. Caro and C. S. Carvalho and F. Cogato and A. R. Cooray and O. Cucciati and T. de Boer and G. Desprez and A. Díaz-Sánchez and S. Di Domizio and J. M. Diego and V. Duret and M. Y. Elkhashab and A. Enia and Y. Fang and A. Finoguenov and A. Franco and K. Ganga and T. Gasparetto and R. Gavazzi and E. Gaztanaga and F. Giacomini and F. Gianotti and G. Gozaliasl and A. Gruppuso and M. Guidi and C. M. Gutierrez and A. Hall and C. Hernández-Monteagudo and H. Hildebrandt and J. Hjorth and J. J. E. Kajava and Y. Kang and V. Kansal and D. Karagiannis and K. Kiiveri and J. Kim and C. C. Kirkpatrick and K. Koyama and S. Kruk and M. C. Lam and M. Lattanzi and L. Legrand and M. Lembo and G. Leroy and G. F. Lesci and J. Lesgourgues and T. I. Liaudat and S. J. Liu and X. Lopez Lopez and M. Magliocchetti and A. Manjón-García and F. Mannucci and C. J. A. P. Martins and L. Maurin and M. Miluzio and C. Moretti and G. Morgante and S. Nadathur and K. Naidoo and A. Navarro-Alsina and S. Nesseris and F. Pace and D. Paoletti and F. Passalacqua and K. Paterson and L. Patrizii and C. Pattison and R. Paviot and A. Pisani and G. W. Pratt and S. Quai and M. Radovich and K. Rojas and W. Roster and S. Sacquegna and M. Sahlén and D. B. Sanders and E. Sarpa and A. Schneider and M. Schultheis and D. Sciotti and E. Sellentin and L. C. Smith and J. G. Sorce and I. Szapudi and K. Tanidis and F. Tarsitano and G. Testera and S. Tosi and A. Troja and C. Uhlemann and C. Valieri and A. Venhola and D. Vergani and G. Verza and P. Vielzeuf and S. Vinciguerra and M. von Wietersheim-Kramsta and N. A. Walton and A. H. Wright and H. W. Yeung},
journal= {arXiv preprint arXiv:2604.14802},
year = {2026}
}
Comments
Submitted to A&A