欧几里亚：快速数据发布 (Q1) —— 跨不同距离与环境的矮星系普查
星系天体物理
2025-03-20 v1
摘要
欧几里亚Q1场的选择目的是用于宇宙学校准，因此相对缺乏附近星系。这正是这批场成为寻找局部密集环境中矮星系的有趣场之处。我们利用欧几里亚快速发布（Q1）的前所未有的深度、空间分辨率和视场大小，对这些区域的矮星系进行普查。我们在覆盖14.25平方度的欧几里亚深场北（EDF-N）中25个连续瓦片中识别了矮星系。矮星系候选对象通过基于欧几里亚管线测量的属性（列于MER目录中）进行半自动检测。对面积亮度和星系亮度施加挑选限制，得到初始的矮星系候选目录，随后对形态和颜色进行限制。该目录经视觉分类后得到最终的矮星系候选样本，包括其形态、核数、全球星系（GC）丰富度以及蓝色紫外中心的存在。我们识别出2674个矮星系候选对象，对应每平方度188个矮星系。矮星系的视觉分类揭示了略不均匀的形态混合：58%为椭圆形，42%为不规则形，几乎没有可能GC丰富（1.0%）和核化（4.0%）的候选对象，但约6.9%的矮星系具有蓝色紫外中心。388个（15%）具有光谱红移的矮星系的距离分布在约400 Mpc处峰值。其星系质量分布确认我们的选拔有效识别了矮星系，同时最大限度地减少了杂质。最显著的矮星系稠密度主要由dE星系主导，而dI星系分布更均匀。本工作凸显了欧几里亚在多样化质量、距离和环境下检测和表征矮星系的非凡能力。
引用
@article{arxiv.2503.15335,
title = {Euclid: Quick Data Release (Q1) -- A census of dwarf galaxies across a range of distances and environments},
author = {F. R. Marleau and R. Habas and D. Carollo and C. Tortora and P. -A. Duc and E. Sola and T. Saifollahi and M. Fügenschuh and M. Walmsley and R. Zöller and A. Ferré-Mateu and M. Cantiello and M. Urbano and E. Saremi and R. Ragusa and R. Laureijs and M. Hilker and O. Müller and M. Poulain and R. F. Peletier and S. J. Sprenger and O. Marchal 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 A. Basset and P. Battaglia and R. Bender and A. Biviano and A. Bonchi and D. Bonino 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 L. Conversi and Y. Copin and L. Corcione and F. Courbin and H. M. Courtois and M. Cropper and J. -C. Cuillandre and A. Da Silva and H. Degaudenzi and G. De Lucia and A. M. Di Giorgio and C. Dolding and H. Dole and F. Dubath and X. Dupac and S. Dusini and S. Escoffier and M. Fabricius and M. Farina and F. Faustini and S. Ferriol and P. Fosalba and S. Fotopoulou and M. Frailis and E. Franceschi and P. Franzetti and M. Fumana and S. Galeotta and K. George and B. Gillis and C. Giocoli and B. R. Granett and A. Grazian and F. Grupp and S. Gwyn and S. V. H. Haugan and J. Hoar and H. Hoekstra and W. Holmes 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 B. Kubik and M. Kümmel and M. Kunz and H. Kurki-Suonio and O. Lahav 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 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 S. Paltani 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 R. Rebolo and A. Renzi and J. Rhodes and G. Riccio and E. Romelli and M. Roncarelli and E. Rossetti and B. Rusholme and R. Saglia and Z. Sakr and A. G. Sánchez and D. Sapone and B. Sartoris and M. Sauvage and J. A. Schewtschenko and M. Schirmer and P. Schneider and M. Scodeggio and A. Secroun and G. Seidel and M. Seiffert and S. Serrano and P. Simon and C. Sirignano and G. Sirri and J. Skottfelt and L. Stanco and J. Steinwagner and P. Tallada-Crespí and D. Tavagnacco and A. N. Taylor and H. I. Teplitz and I. Tereno and S. Toft and R. Toledo-Moreo and F. Torradeflot and I. Tutusaus 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 E. Zucca and M. Bolzonella and C. Burigana and R. Cabanac and L. Gabarra and M. Huertas-Company and V. Scottez and D. Scott},
journal= {arXiv preprint arXiv:2503.15335},
year = {2025}
}
备注
Paper submitted as part of the A&A Special Issue `Euclid Quick Data Release (Q1)', 27 pages, 19 figures, 5 tables