Euclid：早期释放观测——Abell 2390 的团簇内光
星系天体物理
2025-06-11 v1
摘要
团簇内光（Intracluster Light, ICL）记录了星系团所经历的动力学相互作用，为星系团的形成与演化提供了线索。在此，我们分析了位于红移 z=0.228 处的大质量星系团 Abell 2390 中 ICL 的性质。我们的分析基于 Euclid 任务作为早期释放观测一部分在近红外波段（Y、J、H 波段）获取的深场图像，使用了 NISP 仪器在 0.75 deg 的视场内进行观测。我们使用 DAWIS 软件对其进行建模后，在各个波段中扣除了点扩散函数（PSF）模型并去除了银河系卷云的贡献。随后，我们应用三种方法来检测、表征和建模 ICL 及最亮团簇星系（Brightest Cluster Galaxy, BCG）：CICLE 2D 多星系拟合；基于小波的 DAWIS 多尺度软件；以及基于掩膜的 1D 轮廓拟合。我们在 600 kpc 处探测到了 ICL。我们三种方法得出的 ICL 比例介于 18% 至 36% 之间（平均值为 24%），而 BCG+ICL 比例介于 21% 至 41% 之间（平均值为 29%），具体取决于波段和方法。基于 219 个选定星系团成员的星系密度图显示，东南方向存在强烈的星系团子结构，西北方向存在一个较小的特征。根据颜色推断，ICL（延伸至约 400 kpc 处）似乎是由小系统（M ~ 太阳质量）的吸积，或来自银河系类型星系（M ~ 太阳质量）外围的恒星所构建的。尽管 Abell 2390 似乎并未正在经历并合，但它尚未完全弛豫，因为它已经吸积了两个尚未与星系团核心完全并合的星系群。我们估计，西北和东南子群对 ICL 内部 300 kpc 的贡献分别为 21% 和 9%。
关键词
引用
@article{arxiv.2503.07484,
title = {Euclid: Early Release Observations -- The Intracluster Light of Abell 2390},
author = {A. Ellien and M. Montes and S. L. Ahad and P. Dimauro and J. B. Golden-Marx and Y. Jimenez-Teja and F. Durret and C. Bellhouse and J. M. Diego and S. P. Bamford and A. H. Gonzalez and N. A. Hatch and M. Kluge and R. Ragusa and E. Slezak and J. -C. Cuillandre and R. Gavazzi and H. Dole and G. Mahler and G. Congedo and T. Saifollahi and N. Aghanim and B. Altieri and A. Amara and S. Andreon and N. Auricchio and C. Baccigalupi and M. Baldi and A. Balestra and S. Bardelli and A. Basset and P. Battaglia and A. Biviano and A. Bonchi and D. Bonino and E. Branchini and M. Brescia and J. Brinchmann and A. Caillat and S. Camera and V. Capobianco and C. Carbone and V. F. Cardone and J. Carretero and S. Casas and M. Castellano and G. Castignani and S. Cavuoti and A. Cimatti and C. Colodro-Conde 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 G. De Lucia and A. M. Di Giorgio and J. Dinis and F. Dubath and C. A. J. Duncan and X. Dupac and S. Dusini and M. Farina and F. Faustini and S. Ferriol and S. Fotopoulou and M. Frailis and E. Franceschi and S. Galeotta and K. George and B. Gillis and C. Giocoli and P. Gómez-Alvarez and A. Grazian and F. Grupp and L. Guzzo 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 K. Kuijken and M. Kümmel and M. Kunz and H. Kurki-Suonio and R. Laureijs 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 K. Markovic 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 R. C. Nichol 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 R. Saglia and Z. Sakr and D. Sapone and B. Sartoris and R. Scaramella and M. Schirmer and P. Schneider and T. Schrabback and A. Secroun and E. Sefusatti and G. Seidel and M. Seiffert and S. Serrano and C. Sirignano and G. Sirri and L. Stanco and J. -L. Starck and J. Steinwagner and P. Tallada-Crespí and A. N. Taylor and H. I. Teplitz and I. Tereno and R. Toledo-Moreo and F. Torradeflot and A. Tsyganov and I. Tutusaus and L. Valenziano and T. Vassallo and G. Verdoes Kleijn and A. Veropalumbo and Y. Wang and J. Weller and O. R. Williams and E. Zucca and M. Bolzonella and C. Burigana and V. Scottez},
journal= {arXiv preprint arXiv:2503.07484},
year = {2025}
}
备注
23 pages, 20 figures, 2 tables submitted to A\&A