Euclid：基于聚类红移技术的光度红移标定
宇宙学与河外天体物理
2026-05-28 v3
摘要
目标：成像测景对宇宙学约束的精度取决于准确估计切片红移分布 ，尤其是其平均红移。我们评估了聚类红移技术在约束 Euclid 切片红移箱（以满足 的目标不确定性）方面的有效性。本文通过对 Euclid 星系的小尺度角 clustering 进行推断，这些星系被分配到以光谱样本局部化于狭窄红移切片中的箱中。方法：我们从 Flagship2 模拟中为波束联手光谱测绘（BOSS）、暗能量光谱仪器（DESI）以及 Euclid 近红外光谱仪和光度计（NISP）光谱测绘生成光谱模拟数据。我们评估并优化了聚类红移管道，引入了一种新的测量光度星系偏差（clustering）的方法，这是该技术的主要限制因素。结果：我们成功约束了所有切片箱（最高光度红移为 1.6）的红移分布均值和标准差，实现的精度超过了所需阈值。我们识别出主要的偏差来源，特别是 1 双星系分布的影响，对评估交叉相关引入了最小分离尺度为 1.5 Mpc 的限制。这些结果表明聚类红移有望满足 Euclid 的精度要求，并提出了若干未来改进的途径。
引用
@article{arxiv.2505.10416,
title = {Euclid: Photometric redshift calibration with the clustering redshifts technique},
author = {W. d'Assignies and M. Manera and C. Padilla and O. Ilbert and H. Hildebrandt and L. Reynolds and J. Chaves-Montero and A. H. Wright and P. Tallada-Crespí and M. Eriksen and J. Carretero and W. Roster and Y. Kang and K. Naidoo and R. Miquel and B. Altieri and A. Amara and S. Andreon and N. Auricchio and C. Baccigalupi and D. Bagot and M. Baldi and A. Balestra and S. Bardelli and P. Battaglia and A. Biviano and E. Branchini and M. Brescia and S. Camera and V. Capobianco and C. Carbone and V. F. Cardone 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 M. Crocce and A. Da Silva and H. Degaudenzi and S. de la Torre and G. De Lucia and M. Douspis and X. Dupac and A. Ealet and S. Escoffier and M. Farina and F. Faustini and S. Ferriol and F. Finelli and P. Fosalba and S. Fotopoulou and M. Frailis and E. Franceschi and M. Fumana and S. Galeotta and K. George and B. Gillis and C. Giocoli and P. Gómez-Alvarez and J. Gracia-Carpio and A. Grazian and F. Grupp and W. Holmes and I. M. Hook and A. Hornstrup and K. Jahnke and M. Jhabvala and B. Joachimi and E. Keihänen and S. Kermiche and A. Kiessling and B. Kubik and M. Kümmel and M. Kunz and H. Kurki-Suonio and O. Lahav 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 K. Markovic and M. Martinelli and N. Martinet and F. Marulli and R. Massey and D. C. Masters and E. Medinaceli and S. Mei and M. Melchior and Y. Mellier and M. Meneghetti and E. Merlin and G. Meylan and A. Mora and M. Moresco and L. Moscardini and C. Neissner and S. -M. Niemi and S. Paltani and F. Pasian and K. Pedersen 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 E. Rossetti and R. Saglia and Z. Sakr and D. Sapone and B. Sartoris and J. A. Schewtschenko and P. Schneider and T. Schrabback 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 A. Spurio Mancini and L. Stanco and J. Steinwagner and D. Tavagnacco 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 A. Tsyganov and I. Tutusaus and L. Valenziano and J. Valiviita and T. Vassallo and G. Verdoes Kleijn and Y. Wang and J. Weller and G. Zamorani and E. Zucca and M. Bolzonella and C. Burigana and L. Gabarra and J. Martín-Fleitas and I. Risso and V. Scottez and M. Viel},
journal= {arXiv preprint arXiv:2505.10416},
year = {2026}
}
备注
31 pages, 24 figures, 2 tables