欧几里得：早期释放观测——珀尔修斯星系团中的矮星系
星系天体物理
2025-04-30 v1
摘要
我们利用欧几里得对珀尔修斯星系团的早期释放观测前所未有的深度、空间分辨率和视场，探测并表征了这个大质量系统中的矮星系群。对欧几里得高分辨率VIS和VIS+NIR彩色图像进行了目视检查，识别出矮星系候选体。目视评估了它们的形态、核的存在以及球状星团（GC）丰富度，并辅以GC候选体的自动探测。通过二维拟合提取了结构和测光参数，包括欧几里得滤光片颜色。基于此分析，在图像中共发现1100个矮星系候选体，其中638个似乎是新识别。大多数（96%）被归类为矮椭球星系，53%有核，26%富含GC，6%显示受扰动的形态。相对较高比例（8%）的星系被归类为超弥散星系。大多数矮星系遵循预期的标度关系。总体而言，珀尔修斯矮星系的球状星团比频率S_N介于室女座星系团和后发座星系团测量值之间。虽然拥有最多GC计数的矮星系遍布欧几里得视场，但那些位于东西向条带（大多数最亮星系团成员所在处）附近的矮星系平均具有更大的S_N值。矮星系、GC和星系团内光的空间分布显示，一个主要等密度/等光强中心偏离明亮星系光分布向西。珀尔修斯星系团的ERO成像展示了欧几里得同时探测和表征大量矮星系、其核及其GC系统的独特能力，使我们能够构建一个关于星系在广泛质量尺度和环境中形成与演化的详细图景。
引用
@article{arxiv.2405.13502,
title = {Euclid: Early Release Observations -- Dwarf galaxies in the Perseus galaxy cluster},
author = {F. R. Marleau and J. -C. Cuillandre and M. Cantiello and D. Carollo and P. -A. Duc and R. Habas and L. K. Hunt and P. Jablonka and M. Mirabile and M. Mondelin and M. Poulain and T. Saifollahi and R. Sánchez-Janssen and E. Sola and M. Urbano and R. Zöller and M. Bolzonella and A. Lançon and R. Laureijs and O. Marchal and M. Schirmer and C. Stone and A. Boselli and A. Ferré-Mateu and N. A. Hatch and M. Kluge and M. Montes and J. G. Sorce and C. Tortora and A. Venhola and J. B. Golden-Marx and N. Aghanim and A. Amara and S. Andreon and N. Auricchio and M. Baldi and A. Balestra and S. Bardelli and P. Battaglia and R. Bender and C. Bodendorf and E. Branchini and M. Brescia and J. Brinchmann and S. Camera and G. P. Candini and V. Capobianco and C. Carbone and J. Carretero and S. Casas and M. Castellano and S. Cavuoti and A. Cimatti 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 H. Degaudenzi and A. M. Di Giorgio and J. Dinis and M. Douspis and C. A. J. Duncan and X. Dupac and S. Dusini and A. Ealet and M. Farina and S. Farrens and S. Ferriol and P. Fosalba and S. Fotopoulou and M. Frailis and E. Franceschi and M. Fumana and S. Galeotta and B. Garilli and W. Gillard and B. Gillis and C. Giocoli and P. Gómez-Alvarez and A. Grazian and F. Grupp and L. Guzzo and M. Hailey and S. V. H. Haugan and J. Hoar and H. Hoekstra and W. Holmes and I. Hook and F. Hormuth and A. Hornstrup and D. Hu and P. Hudelot and K. Jahnke and M. Jhabvala and E. Keihänen and S. Kermiche and A. Kiessling and T. Kitching and R. Kohley and B. Kubik and K. Kuijken and M. Kümmel and M. Kunz and H. Kurki-Suonio and O. Lahav and D. Le Mignant and S. Ligori and P. B. Lilje and V. Lindholm and I. Lloro and D. Maino and E. Maiorano and O. Mansutti and O. Marggraf and K. Markovic and N. Martinet and F. Marulli and R. Massey and S. Maurogordato and H. J. McCracken and E. Medinaceli and S. Mei and Y. Mellier and M. Meneghetti and E. Merlin and G. Meylan and M. Moresco and L. Moscardini and E. Munari and R. Nakajima and R. C. Nichol and S. -M. Niemi 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. Refregier and A. Renzi and J. Rhodes and G. Riccio and H. -W. Rix and E. Romelli and M. Roncarelli and E. Rossetti and R. Saglia and D. Sapone and R. Scaramella and P. Schneider and A. Secroun and G. Seidel and M. Seiffert and S. Serrano and C. Sirignano and G. Sirri and L. Stanco and P. Tallada-Crespí and A. N. Taylor and H. I. Teplitz and I. Tereno and R. Toledo-Moreo and A. Tsyganov and I. Tutusaus and E. A. Valentijn and L. Valenziano and T. Vassallo and G. Verdoes Kleijn and A. Veropalumbo and Y. Wang and J. Weller and O. R. Williams and G. Zamorani and E. Zucca and C. Baccigalupi and A. Biviano and C. Burigana and G. De Lucia and K. George and V. Scottez and M. Viel and P. Simon and A. Mora and J. Martín-Fleitas and D. Scott},
journal= {arXiv preprint arXiv:2405.13502},
year = {2025}
}
备注
44 pages, 24 figures, 5 tables, paper submitted to A&A 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