Euclid 准备工作：利用模拟的 Euclid 深场光谱样本进行宇宙网的三维重建
星系天体物理
2026-04-08 v1 宇宙学与河外天体物理
摘要
正在进行的 Euclid 任务旨在利用从 Euclid 深场（EDFs）近红外无狭缝光谱数据中探测到的 H 谱线发射，测量大约两百万个星系的光谱红移。这些测量将在 的红移范围内达到 的流量极限，为涉及星系演化的众多研究打开了大门，远远超出了任务的核心目标。所达到的 H 亮度深度将带来足够高的采样率，从而能够重建大尺度星系环境。我们评估了在 EDFs 中利用预期光谱数据集对星系宇宙网环境重建的质量。该分析在 Flagship 和 GAEA 星系模拟目录上进行。重建的质量首先使用在宇宙网上测量的几何与拓扑统计量进行评估，即纤维的长度、墙的面积、空洞的体积，以及其连通性和多重性。然后，我们量化了星系性质随距纤维距离的梯度能被多精确地恢复。正如预期，小尺度红移空间畸变对纤维长度和连通性有强烈影响，但可以通过在骨架提取前压缩星系群来缓解。仅依赖 H 发射体时，宇宙网重建存在偏差。这种局限性可以通过在重建过程中应用恒星质量加权来缓解。然而，这种方法引入了非平凡的偏差，在与理论预测进行比较时需要加以考虑。红移不确定性是恢复星系性质预期依赖关系的最大挑战，尽管向纤维的、已充分确立的恒星质量横向梯度仍然可以被观测到。
引用
@article{arxiv.2601.10709,
title = {Euclid preparation. 3D reconstruction of the cosmic web with simulated Euclid Deep spectroscopic samples},
author = {Euclid Collaboration and K. Kraljic and C. Laigle and M. Balogh and P. Jablonka and U. Kuchner and N. Malavasi and F. Sarron and C. Pichon and G. De Lucia and M. Bethermin and F. Durret and M. Fumagalli and C. Gouin and M. Magliocchetti and J. G. Sorce and O. Cucciati and F. Fontanot and M. Hirschmann and Y. Kang and M. Spinelli and N. Aghanim and A. Amara and S. Andreon and N. Auricchio and C. Baccigalupi and M. Baldi and S. Bardelli and A. Biviano and E. Branchini and M. Brescia and J. Brinchmann and S. Camera and G. Cañas-Herrera and V. Capobianco and C. Carbone and J. Carretero and R. Casas and S. Casas and F. J. Castander and M. Castellano and G. Castignani and S. Cavuoti and K. C. Chambers and A. Cimatti and C. Colodro-Conde and G. Congedo and C. J. Conselice and L. Conversi and Y. Copin and F. Courbin and H. M. Courtois and A. Da Silva and H. Degaudenzi and S. de la Torre and H. Dole and M. Douspis and F. Dubath and C. A. J. Duncan and X. Dupac and S. Dusini and S. Escoffier and M. Farina and R. Farinelli and S. Ferriol and F. Finelli and P. Fosalba and N. Fourmanoit and M. Frailis and E. Franceschi and M. Fumana and S. Galeotta and K. George and W. Gillard and B. Gillis and C. Giocoli and J. Gracia-Carpio and A. Grazian and F. Grupp and S. V. H. Haugan and W. Holmes and F. Hormuth and A. Hornstrup and K. Jahnke and M. Jhabvala and B. Joachimi and E. Keihänen and S. Kermiche and A. Kiessling and M. Kilbinger 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 D. Maino and E. Maiorano and O. Mansutti and S. Marcin and O. Marggraf and M. Martinelli and N. Martinet and F. Marulli and R. Massey and S. Maurogordato and E. Medinaceli and S. Mei and Y. Mellier 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 C. Padilla and S. Paltani and F. Pasian and K. Pedersen and W. J. Percival and V. Pettorino and S. Pires and G. Polenta and M. Poncet and L. A. Popa and L. Pozzetti and F. Raison and R. Rebolo and A. Renzi and J. Rhodes and G. Riccio and E. Romelli and M. Roncarelli and C. Rosset and E. Rossetti and R. Saglia and Z. Sakr and A. G. Sánchez and D. Sapone and B. Sartoris and P. Schneider and T. Schrabback and M. Scodeggio and A. Secroun and E. Sefusatti and G. Seidel and M. Seiffert and S. Serrano and P. Simon and C. Sirignano and G. Sirri and L. Stanco and J. Steinwagner and P. Tallada-Crespí and A. N. Taylor and H. I. Teplitz and I. Tereno and N. Tessore and S. Toft and R. Toledo-Moreo and F. Torradeflot and I. Tutusaus and L. Valenziano and J. Valiviita and T. Vassallo and G. Verdoes Kleijn and A. Veropalumbo and D. Vibert and Y. Wang and J. Weller and A. Zacchei and G. Zamorani and E. Zucca and V. Allevato and M. Ballardini and M. Bolzonella and E. Bozzo and C. Burigana and R. Cabanac and M. Calabrese and A. Cappi and D. Di Ferdinando and J. A. Escartin Vigo and L. Gabarra and W. G. Hartley and J. Martín-Fleitas and S. Matthew and N. Mauri and R. B. Metcalf and A. A. Nucita and A. Pezzotta and M. Pöntinen and C. Porciani and I. Risso and V. Scottez and M. Sereno and M. Tenti and M. Viel and M. Wiesmann and Y. Akrami and S. Alvi and I. T. Andika and S. Anselmi and M. Archidiacono and F. Atrio-Barandela and A. Balaguera-Antolinez and P. Bergamini and D. Bertacca and A. Blanchard and L. Blot and H. Böhringer and S. Borgani and M. L. Brown and S. Bruton and A. Calabro and B. Camacho Quevedo and F. Caro and C. S. Carvalho and T. Castro and R. Chary and F. Cogato and S. Conseil and T. Contini and A. R. Cooray and S. Davini and F. De Paolis and G. Desprez and A. Díaz-Sánchez and J. J. Diaz and S. Di Domizio and J. M. Diego and P. Dimauro and P. -A. Duc and A. Enia and Y. Fang and A. G. Ferrari and A. Finoguenov and A. Fontana and A. Franco and K. Ganga and J. García-Bellido and T. Gasparetto and R. Gavazzi and E. Gaztanaga and F. Giacomini and F. Gianotti and G. Gozaliasl and M. Guidi and C. M. Gutierrez and A. Hall and H. Hildebrandt and J. Hjorth and S. Joudaki and J. J. E. Kajava and V. Kansal and D. Karagiannis and K. Kiiveri and C. C. Kirkpatrick and S. Kruk and M. Lattanzi and V. Le Brun and J. Le Graet and L. Legrand and M. Lembo and F. Lepori and G. Leroy and G. F. Lesci and J. Lesgourgues and L. Leuzzi and T. I. Liaudat and S. J. Liu and A. Loureiro and J. Macias-Perez and G. Maggio and E. A. Magnier and F. Mannucci and R. Maoli and C. J. A. P. Martins and L. Maurin and M. Miluzio and P. Monaco and C. Moretti and G. Morgante and S. Nadathur and K. Naidoo and A. Navarro-Alsina and S. Nesseris and L. Pagano and F. Passalacqua and K. Paterson and L. Patrizii and A. Pisani and D. Potter and S. Quai and M. Radovich and P. -F. Rocci and G. Rodighiero and S. Sacquegna and M. Sahlén and D. B. Sanders and A. Schneider and D. Sciotti and E. Sellentin and L. C. Smith and K. Tanidis and C. Tao and G. Testera and R. Teyssier and S. Tosi and A. Troja and M. Tucci and C. Valieri and A. Venhola and D. Vergani and G. Verza and P. Vielzeuf and N. A. Walton},
journal= {arXiv preprint arXiv:2601.10709},
year = {2026}
}
备注
30 pages, 23 figures. Accepted for publication in A&A