欧几里得：早期释放观测。阿贝尔 2390 星系团的弱引力透镜分析
宇宙学与河外天体物理
2026-04-29 v1
摘要
欧几里得太空望远镜是由欧洲空间航天局（ESA）设计，用于对广阔天空区域提供灵敏且准确的弱引力透镜扭曲测量。本文报告了阿贝尔 2390 星系团区域获取的欧几里得早期释放观测的弱引力透镜分析，作为欧几里得早期释放观测计划的一部分。我们使用三种独立算法（LensMC、KSB+ 和 SourceXtractor++）进行星系形状测量。融合欧几里得和 Subaru/Suprime-Cam 的多波段光度 photometry，我们估计光度红移以优先选择来自 tomographic 红移 bin 的背景源，针对这些 bin 校准红移分布，采用自组织地图方法并利用来自 Cosmic Evolution Survey（COSMOS）的数据。我们量化残余星系团成员的混杂，并根据光度红移和星系亮度的源密度轮廓进行校正，包括对源遮蔽和放大效应的校正。我们重构星系团质量分布，并联合拟合不同 tomographic bin 的切向简化剪切轮廓，以球形 Navarro--Frenk--White 概率预测为依据，以约束星系团质量，发现三种形状目录表得到的结果一致且与早期测量良好一致。作为重要的验证测试，我们将这些联合约束与为不同 tomographic bin 单独获得的质量测量进行比较，发现一致性良好。更详细的星系团性质约束将在另一篇论文中呈现，该论文额外包含强引力测量。我们的分析首次展示了欧几里得在 tomographic 弱引力测量方面的卓越能力。
引用
@article{arxiv.2507.07629,
title = {Euclid: Early Release Observations. Weak gravitational lensing analysis of Abell 2390},
author = {T. Schrabback and G. Congedo and R. Gavazzi and W. G. Hartley and H. Jansen and Y. Kang and F. Kleinebreil and H. Atek and E. Bertin and J. -C. Cuillandre and J. M. Diego and S. Grandis and H. Hoekstra and M. Kümmel and L. Linke and H. Miyatake and N. Okabe and S. Paltani and M. Schefer and P. Simon and F. Tarsitano and A. N. Taylor and J. R. Weaver and R. Bhatawdekar and M. Montes and P. Rosati and S. Toft and B. Altieri and A. Amara and L. Amendola and S. Andreon and N. Auricchio and C. Baccigalupi and M. Baldi and A. Balestra and S. Bardelli and P. Battaglia and R. Bender and A. Biviano and E. Branchini and M. Brescia and J. Brinchmann and S. Camera and G. Cañas-Herrera and G. P. Candini and V. Capobianco and C. Carbone and V. F. Cardone and J. Carretero 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 C. J. Conselice and L. Conversi and Y. Copin and A. Costille and F. Courbin and H. M. Courtois and M. Cropper and A. Da Silva and H. Degaudenzi and G. De Lucia and H. Dole and M. Douspis and F. Dubath and X. Dupac and S. Dusini and S. Escoffier and M. Farina and R. Farinelli and S. Farrens and F. Faustini and S. Ferriol and F. Finelli and P. Fosalba 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 J. Hoar and W. Holmes and I. M. Hook and F. Hormuth and A. Hornstrup and P. Hudelot and K. Jahnke and M. Jhabvala and B. Joachimi and E. Keihänen and S. Kermiche and M. Kilbinger and B. Kubik and K. Kuijken and M. Kunz and H. Kurki-Suonio and R. Laureijs and A. M. C. Le Brun and D. Le Mignant 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. J. Massey and S. Maurogordato and E. Medinaceli and S. Mei and Y. Mellier and M. Meneghetti and E. Merlin and G. Meylan and J. J. Mohr and A. Mora and M. Moresco and L. Moscardini and R. Nakajima and C. Neissner and R. C. Nichol and S. -M. Niemi and C. Padilla 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 A. Renzi and J. Rhodes and G. Riccio and E. Romelli and M. Roncarelli and C. Rosset and R. Saglia and Z. Sakr and D. Sapone and B. Sartoris and M. Schirmer and P. Schneider and A. Secroun and G. Seidel and M. Seiffert and S. Serrano and C. Sirignano and G. Sirri and A. Spurio Mancini and L. Stanco and J. Steinwagner and P. Tallada-Crespí and I. Tereno and N. Tessore and R. Toledo-Moreo and F. Torradeflot and I. Tutusaus and E. A. Valentijn and L. Valenziano and J. Valiviita and T. Vassallo and G. Verdoes Kleijn and A. Veropalumbo and Y. Wang and J. Weller and G. Zamorani and F. M. Zerbi and E. Zucca and M. Bolzonella and C. Burigana and L. Gabarra and J. Martín-Fleitas and S. Matthew and A. Pezzotta and V. Scottez and M. Sereno and M. Viel and D. Scott},
journal= {arXiv preprint arXiv:2507.07629},
year = {2026}
}
备注
This paper is published on behalf of the Euclid Consortium. 28 pages, 27 figures, 7 tables. Submitted to A&A