Euclid 快速数据发布 (Q1)。基于 PHZ 处理函数的光度红移及星系物理属性
星系天体物理
2025-03-20 v1 宇宙学与河外天体物理
天体物理仪器与方法
摘要
ESA Euclid 任务将测量数十亿星系的光度红移，以在光学和近红外波段提供精确的三维宇宙视图。光度红移通过 Euclid 及地面观测的多波段光度数据由 PHZ 处理函数决定。本文描述了用于 Euclid 快速数据发布的 PHZ 处理流程、输出产品及其验证。PHZ 流程主要完成以下任务：基于光度颜色对源进行星、星系和类鉴别；确定光度红移及星系的物理属性。该分类能够提供高纯度的恒星样本、高度完整的星系样本以及可靠的归属概率。类鉴别识别结果较为困难：光度信息似乎不足以准确区分类鉴和星系。流水线在光度红移 determination 方面的性能通过 COSMOS2020 目录和大规模光谱红移样本进行测试。结果符合预期：估计精度符合 Euclid 要求，但如预期，需要进行偏差校正才能达到 cosmological探针所需的精度。最后，流水线提供了可靠的星系物理属性估计，与 COSMOS2020 目录的结果良好一致，除非存在极端年轻星系且特定星形成率异常高的情形。针对这些问题对象的合适先验条件的应用足以获得可靠的物理属性。我们提出了几项未来 Euclid 数据发布的改进方向。
引用
@article{arxiv.2503.15306,
title = {Euclid Quick Data Release (Q1). Photometric redshifts and physical properties of galaxies through the PHZ processing function},
author = {Euclid Collaboration and M. Tucci and S. Paltani and W. G. Hartley and F. Dubath and N. Morisset and M. Bolzonella and S. Fotopoulou and F. Tarsitano and C. Saulder and L. Pozzetti and A. Enia and Y. Kang and H. Degaudenzi and R. Saglia and M. Salvato and O. Ilbert and S. A. Stanford and W. Roster and F. J. Castander and A. Humphrey and H. Landt and M. Selwood and G. Stevens and N. Aghanim and B. Altieri and A. Amara and S. Andreon and N. Auricchio and H. Aussel and C. Baccigalupi and M. Baldi and A. Balestra and S. Bardelli and P. Battaglia and A. N. Belikov and F. Bernardeau and A. Biviano and A. Bonchi 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 S. Casas 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. Cropper and A. Da Silva and G. De Lucia and A. M. Di Giorgio and H. Dole and C. A. J. Duncan and X. Dupac and A. Ealet and S. Escoffier and M. Fabricius and M. Farina and R. Farinelli and S. Ferriol and F. Finelli 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 P. Gómez-Alvarez and J. Gracia-Carpio and B. R. Granett and A. Grazian and F. Grupp and S. V. H. Haugan and J. Hoar and H. Hoekstra 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 A. Kiessling and M. Kilbinger and B. Kubik and M. Kümmel and M. Kunz and H. Kurki-Suonio and Q. Le Boulc'h and A. M. C. Le Brun and D. Le Mignant and P. Liebing 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 D. C. Masters and S. Maurogordato and H. J. McCracken 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 R. Nakajima and C. Neissner and S. -M. Niemi and J. W. Nightingale 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 G. D. Racca and F. Raison and R. Rebolo and A. Renzi and J. Rhodes and G. Riccio and E. Romelli and M. Roncarelli and B. Rusholme and Z. Sakr and A. G. Sánchez and D. Sapone and B. Sartoris and J. A. Schewtschenko and M. Schirmer and P. Schneider and A. Secroun and E. Sefusatti 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 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 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 A. Zacchei and G. Zamorani and F. M. Zerbi and I. A. Zinchenko and E. Zucca and V. Allevato and M. Ballardini and C. Burigana and R. Cabanac and A. Cappi and P. Casenove and D. Di Ferdinando and J. A. Escartin Vigo and G. Fabbian and L. Gabarra and M. Huertas-Company and J. Martín-Fleitas and S. Matthew and M. Maturi 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 I. T. Andika and S. Anselmi and M. Archidiacono and F. Atrio-Barandela and C. Benoist and K. Benson and D. Bertacca and M. Bethermin and L. Bisigello 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 A. R. Cooray and O. Cucciati 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. -A. Duc and Y. Fang and A. M. N. Ferguson and A. G. Ferrari and P. G. Ferreira and A. Finoguenov and A. Fontana and A. Franco and K. Ganga and J. García-Bellido and T. Gasparetto and V. Gautard and E. Gaztanaga and F. Giacomini and A. H. Gonzalez and G. Gozaliasl and M. Guidi and C. M. Gutierrez and A. Hall and S. Hemmati and C. Hernández-Monteagudo and H. Hildebrandt and J. Hjorth and J. J. E. Kajava and V. Kansal and D. Karagiannis and K. Kiiveri and C. C. Kirkpatrick and S. Kruk 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 A. Loureiro and J. Macias-Perez and G. Maggio and M. Magliocchetti 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 M. Oguri 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 E. Sarpa and C. Scarlata and J. Schaye and A. Schneider and D. Sciotti and E. Sellentin and L. C. Smith and K. Tanidis and G. Testera and R. Teyssier and S. Tosi and A. Troja and C. Valieri and A. Venhola and D. Vergani and G. Verza and P. Vielzeuf and N. A. Walton and J. R. Weaver and J. G. Sorce and E. Soubrie and D. Scott},
journal= {arXiv preprint arXiv:2503.15306},
year = {2025}
}
备注
Paper submitted as part of the A&A Special Issue `Euclid Quick Data Release (Q1)', 23 pages, 18 figures