欧几里得任务准备 XXVI. 欧几里得形态学挑战：面向数十亿星系的结构参数
星系天体物理
2023-03-15 v2 天体物理仪器与方法
摘要
欧几里得各项成像巡天将通过对前所未有的 15000 平方度区域进行高空间分辨率成像，成为星系形态学研究的重要参考。为理解从欧几里得探测星系测量形态学的能力并协助在流水线中实现测量，我们开展了欧几里得形态学挑战，并以两篇论文呈现。Merlin 等人的 companion 论文聚焦于测光分析，本文则评估了在欧几里得宽巡天预测图像中参数化星系形态学测量的精度。我们在约 150 万颗模拟星系样本上评估了五种最先进的面亮度拟合代码 DeepLeGATo、Galapagos-2、Morfometryka、Profit 和 SourceXtractor++ 的性能，这些样本类似于用欧几里得 VIS 和 NIR 仪器所得的简化观测。模拟包含单双组分的分析 S\'ersic 轮廓，以及用神经网络生成的更真实星系。我们发现，尽管存在代码特定的差异，所有方法在理想 S\'ersic 模拟下均能实现可靠的结构测量（10% 散射），极限表观星等约为单组分 23、双组分 21，分别对应信噪比约 1 和 5。我们还表明，当在非分析轮廓上测试时，结果通常因系统误差退化约 3 倍。我们得出结论：欧几里得官方数据发布将在任务结束时为欧几里得宽巡天中至少 4 亿星系提供稳健的结构参数。我们发现解释各代码在暗端不同行为的一个关键因素是各结构参数所采用的先验集合。
引用
@article{arxiv.2209.12907,
title = {Euclid preparation XXVI. The Euclid Morphology Challenge. Towards structural parameters for billions of galaxies},
author = {Euclid Collaboration and H. Bretonnière and U. Kuchner and M. Huertas-Company and E. Merlin and M. Castellano and D. Tuccillo and F. Buitrago and C. J. Conselice and A. Boucaud and B. Häußler and M. Kümmel and W. G. Hartley and A. Alvarez Ayllon and E. Bertin and F. Ferrari and L. Ferreira and R. Gavazzi and D. Hernández-Lang and G. Lucatelli and A. S. G. Robotham and M. Schefer and L. Wang and R. Cabanac and H. Domínguez Sánchez and P. -A. Duc and S. Fotopoulou and S. Kruk and A. La Marca and B. Margalef-Bentabol and F. R. Marleau and C. Tortora and N. Aghanim and A. Amara and N. Auricchio and R. Azzollini and M. Baldi and R. Bender and C. Bodendorf and E. Branchini and M. Brescia and J. Brinchmann and S. Camera and V. Capobianco and C. Carbone and J. Carretero and F. J. Castander and S. Cavuoti and A. Cimatti and R. Cledassou and G. Congedo and L. Conversi and Y. Copin and L. Corcione and F. Courbin and M. Cropper and A. Da Silva and H. Degaudenzi and J. Dinis and F. Dubath and C. A. J. Duncan and X. Dupac and S. Dusini and S. Farrens and S. Ferriol and M. Frailis and E. Franceschi and M. Fumana and S. Galeotta and B. Garilli and B. Gillis and C. Giocoli and A. Grazian and F. Grupp and S. V. H. Haugan and H. Hoekstra and W. Holmes and F. Hormuth and A. Hornstrup and P. Hudelot and K. Jahnke and S. Kermiche and A. Kiessling and R. Kohley and M. Kunz and H. Kurki-Suonio and S. Ligori and P. B. Lilje and I. Lloro and O. Mansutti and O. Marggraf and K. Markovic and F. Marulli and R. Massey and H. J. McCracken and E. Medinaceli and M. Melchior and M. Meneghetti and G. Meylan and M. Moresco and L. Moscardini and E. Munari and S. M. Niemi and C. Padilla and S. Paltani and F. Pasian and K. Pedersen and W. Percival and V. Pettorino and G. Polenta and M. Poncet and L. Pozzetti and F. Raison and R. Rebolo and A. Renzi and J. Rhodes and G. Riccio and E. Romelli and C. Rosset and E. Rossetti and R. Saglia and D. Sapone and B. Sartoris and P. Schneider and A. Secroun and G. Seidel and C. Sirignano and G. Sirri and J. Skottfelt and J. -L. Starck and P. Tallada-Crespí and A. N. Taylor and I. Tereno and R. Toledo-Moreo and I. Tutusaus and E. A. Valentijn and L. Valenziano and T. Vassallo and Y. Wang and J. Weller and G. Zamorani and J. Zoubian and S. Andreon and S. Bardelli and C. Colodro-Conde and D. Di Ferdinando and J. Graciá-Carpio and V. Lindholm and N. Mauri and S. Mei and V. Scottez and E. Zucca and C. Baccigalupi and M. Ballardini and F. Bernardeau and A. Biviano and S. Borgani and A. S. Borlaff and C. Burigana and A. Cappi and C. S. Carvalho and S. Casas and G. Castignani and A. R. Cooray and J. Coupon and H. M. Courtois and S. Davini and G. De Lucia and G. Desprez and J. A. Escartin and S. Escoffier and M. Fabricius and M. Farina and A. Fontana and K. Ganga and J. Garcia-Bellido and K. George and G. Gozaliasl and H. Hildebrandt and I. Hook and O. Ilbert and S. Ilić and B. Joachimi and V. Kansal and E. Keihanen and C. C. Kirkpatrick and A. Loureiro and J. Macias-Perez and M. Magliocchetti and R. Maoli and S. Marcin and M. Martinelli and N. Martinet and M. Maturi and P. Monaco and G. Morgante and S. Nadathur and A. A. Nucita and L. Patrizii and V. Popa and C. Porciani and D. Potter and A. Pourtsidou and M. Pöntinen and P. Reimberg and A. G. Sánchez and Z. Sakr and M. Schirmer and E. Sefusatti and M. Sereno and J. Stadel and R. Teyssier and J. Valiviita and S. E. van Mierlo and A. Veropalumbo and M. Viel and J. R. Weaver and D. Scott},
journal= {arXiv preprint arXiv:2209.12907},
year = {2023}
}
备注
Accepted by A&A. 30 pages, 23+6 figures, Euclid pre-launch key paper. Companion paper: Euclid Collaboration XXV: Merlin et al. 2022 Minor corrections after journal review