Euclid. V. Flagship星系模拟星表：欧几里得任务的综合模拟
宇宙学与河外天体物理
2025-04-30 v1
摘要
我们介绍了Flagship星系模拟，一个数十亿星系的模拟星表，旨在支持欧几里得任务的科学开发。欧几里得是欧洲空间局的中等规模任务，优化用于确定宇宙最大尺度上暗物质和暗能量的性质。它主要通过弱引力透镜和星系成团数据的结合，探测超过100亿年的结构形成。欧几里得数据的广度也将促进各种科学分析。Flagship模拟旨在提供欧几里得将观测并用于其科学分析的星系的真实近似。我们运行了最先进的N体模拟，包含四万亿粒子，实时产生光锥。从暗物质粒子中，我们在光锥的一个八分之一天区中产生了160亿个暗晕，红移直到z=3。然后我们使用暗晕占据分布和丰度匹配方法，用模拟星系填充这些暗晕，并根据观测到的相关性和其他基本星系属性校准星系模拟的自由参数。模拟的星系属性包括多个波段的光度和通量、红移、位置和速度、光谱能量分布、形状和大小、恒星质量、恒星形成率、金属丰度、发射线通量和透镜性质。我们选择了最终样本，包含34亿个星系，星等截止为H_E<26，在此处我们完备。我们进行了一系列全面的验证测试，以检查与观测数据和理论模型的相似性。特别是，我们的星表能够紧密再现任务主要宇宙学分析中将使用的弱透镜和星系成团样本的主要特征。（删节）
引用
@article{arxiv.2405.13495,
title = {Euclid. V. The Flagship galaxy mock catalogue: a comprehensive simulation for the Euclid mission},
author = {Euclid Collaboration and F. J. Castander and P. Fosalba and J. Stadel and D. Potter and J. Carretero and P. Tallada-Crespí and L. Pozzetti and M. Bolzonella and G. A. Mamon and L. Blot and K. Hoffmann and M. Huertas-Company and P. Monaco and E. J. Gonzalez and G. De Lucia and C. Scarlata and M. -A. Breton and L. Linke and C. Viglione and S. -S. Li and Z. Zhai and Z. Baghkhani and K. Pardede and C. Neissner and R. Teyssier and M. Crocce and I. Tutusaus and L. Miller and G. Congedo and A. Biviano and M. Hirschmann and A. Pezzotta and H. Aussel and H. Hoekstra and T. Kitching and W. J. Percival and L. Guzzo and Y. Mellier and P. A. Oesch and R. A. A. Bowler and S. Bruton and V. Allevato and V. Gonzalez-Perez and M. Manera and S. Avila and A. Kovács and N. Aghanim and B. Altieri and A. Amara and L. Amendola and S. Andreon and N. Auricchio and M. Baldi and A. Balestra and S. Bardelli and R. Bender and C. Bodendorf and D. Bonino and E. Branchini and M. Brescia and J. 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journal= {arXiv preprint arXiv:2405.13495},
year = {2025}
}
备注
Paper submitted as part of the A&A special issue `Euclid on Sky', which contains Euclid key reference papers and first results from the Euclid Early Release Observations