Euclid 快速数据发布（Q1）。淬灭星系的概率分类
星系天体物理
2025-10-27 v3 宇宙学与河外天体物理
摘要
研究是什么驱动星系中恒星形成的淬灭，对于理解星系的演化至关重要。Euclid 任务将提供从光学到红外波段的数百万星系的丰富数据，并实现对恒星形成历史的精确测量。利用 Euclid 第一次快速数据发布（Q1），我们开发了一个概率分类框架，结合在两个时间尺度（、 年）上推断的平均比恒星形成率，将星系分类为「衰老」（ secularly evolving）、「淬灭」（recently halted star formation）或「退休」（由年老恒星主导）。采用了两种分类方法：一种是概率方法，整合后验分布；另一种是模型驱动方法，利用 IllustrisTNG 优化样本的纯度和完备性。在 且 的条件下，我们分别获得了衰老、淬灭和退休群体的 Euclid 分类比例 68–72%、8–17% 和 14–19%。衰老和退休星系分别主导低质量端和高质量端，而淬灭星系在 时超过退休比例。随红移的演化显示衰老星系比例增加，退休星系比例减少。质量更大的星系通常比低质量星系更早经历淬灭事件。在质量–大小–金属丰度关系方面，衰老星系通常呈现盘状形态和低金属丰度。退休星系表现出致密结构和增强的化学增丰，而淬灭星系形成一个中间群体，比衰老系统更致密且化学演化程度更高。这项工作展示了 Euclid 在阐明驱动星系演化的淬灭机制的物理本质方面的巨大潜力。
引用
@article{arxiv.2503.15315,
title = {Euclid Quick Data Release (Q1). A probabilistic classification of quenched galaxies},
author = {Euclid Collaboration and P. Corcho-Caballero and Y. Ascasibar and G. Verdoes Kleijn and C. C. Lovell and G. De Lucia and C. Cleland and F. Fontanot and C. Tortora and L. V. E. Koopmans and S. Eales and T. Moutard and C. Laigle and A. Nersesian and F. Shankar and M. Dunn and N. Aghanim and B. Altieri and A. Amara and S. Andreon and H. Aussel and C. Baccigalupi and M. Baldi and A. Balestra and S. Bardelli and P. Battaglia and A. Biviano and A. Bonchi and D. Bonino and E. Branchini and M. Brescia and J. Brinchmann and G. Cañas-Herrera and V. Capobianco and C. Carbone 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 G. Congedo 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 A. M. Di Giorgio and C. Dolding and H. Dole and F. Dubath and X. Dupac and A. Ealet and S. Escoffier and M. Farina and R. Farinelli and F. Faustini and S. Ferriol and F. Finelli 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 J. Gracia-Carpio and B. R. Granett and A. Grazian and F. Grupp and L. Guzzo and S. Gwyn and S. V. H. Haugan and W. Holmes and I. M. Hook and F. Hormuth and A. Hornstrup and P. Hudelot and K. Jahnke and M. Jhabvala and E. Keihänen and S. Kermiche and A. Kiessling and B. Kubik and K. Kuijken 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 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 S. Maurogordato 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 S. Paltani and F. Pasian and W. J. Percival and V. Pettorino 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 R. Saglia and Z. Sakr and A. G. Sánchez and D. Sapone and B. Sartoris and J. A. Schewtschenko and P. Schneider and T. Schrabback and M. Scodeggio and A. Secroun and G. Seidel and S. Serrano and P. Simon and C. Sirignano and G. Sirri and L. Stanco and J. Steinwagner and P. Tallada-Crespí and A. N. Taylor and I. Tereno and N. Tessore and S. Toft and R. Toledo-Moreo and F. Torradeflot and I. Tutusaus and L. Valenziano and J. Valiviita and T. Vassallo 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 M. Bolzonella and E. Bozzo and C. Burigana and R. Cabanac and A. Cappi and D. Di Ferdinando and J. A. Escartin Vigo and L. Gabarra and M. Huertas-Company and J. Martín-Fleitas and S. Matthew and N. Mauri and R. B. Metcalf 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 S. Alvi and I. T. Andika and S. Anselmi and M. Archidiacono and F. Atrio-Barandela and K. Benson and D. Bertacca and M. Bethermin and A. Blanchard and L. Blot and S. Borgani and M. L. Brown and S. Bruton and A. Calabro and F. Caro and C. S. Carvalho and T. Castro 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 A. Enia and Y. Fang 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 F. Gianotti and G. Gozaliasl and M. Guidi and C. M. Gutierrez and A. Hall and W. G. Hartley and S. Hemmati and H. Hildebrandt and J. Hjorth and J. J. E. Kajava and Y. Kang 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 S. J. Liu and A. Loureiro and J. Macias-Perez and G. Maggio and M. Magliocchetti and E. A. Magnier and C. Mancini 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 K. Naidoo and A. Navarro-Alsina and S. Nesseris 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 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 S. A. Stanford and K. Tanidis and G. Testera and R. Teyssier and S. Tosi and A. Troja and M. Tucci 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},
journal= {arXiv preprint arXiv:2503.15315},
year = {2025}
}
备注
Paper accepted for publication as part of the A&A Special Issue `Euclid Quick Data Release (Q1)', 28 pages, 11 figures (+ 3 appendices)