Euclid: 快速数据发布 (Q1)——星系近距离交会与射电活动之间的联系
星系天体物理
2025-11-06 v1
摘要
利用 Euclid 和 LOFAR 巡天提供的大样本统计，我们首次对直到 z=2 的射电源的射电辐射及其形态与宿主星系并合性质之间的联系进行了大规模研究。通过将射电样本分为活动星系核 (AGN) 和恒星形成星系，我们发现发射射电的 AGN 明显倾向于存在于正在经历并合事件的星系中。这对于呈现延展和/或复杂射电辐射的 AGN 更为显著：事实上，其中约一半与并合系统相关，而只有 15% 由孤立星系宿主。观测到的趋势主要由位于 z < 1 的 AGN 驱动，尤其是在高射电光度（P144MHz > 10^24 W Hz-1 sr-1）的情况下（无论射电形态如何，60% 处于并合中，而孤立星系中为 10%）。在发射射电的恒星形成星系的情况下，情况则相反，它们更倾向于与孤立系统相关。当我们转向低射电光度/恒星形成天体（P144MHz < 10^23 W Hz-1 sr-1）时，这一点更为显著，我们发现 40% 处于孤立系统中，而 20% 处于并合中。这些数值与红移无关。我们将上述 AGN 的结果解释为它们需要通过局域交会吸积外部气体以触发（射电）活动，特别是在存在延展射电辐射（如热点和瓣）的情况下。这主要在 z < 1 时观察到，因为在局域宇宙中，星系比其高红移对应体更缺乏气体。相反，内部气体储库似乎足以触发大多数星系内的恒星形成，这些星系在所有探测到的红移下确实更倾向于与孤立系统相关联。(摘要精简)
引用
@article{arxiv.2511.02970,
title = {Euclid: Quick Data Release (Q1)- The connection between galaxy close encounters and radio activity},
author = {M. Magliocchetti and A. La Marca and L. Bisigello and M. Bondi and F. Ricci and S. Fotopoulou and L. Wang and R. Scaramella and L. Pentericci and I. Prandoni and J. G. Sorce and H. J. A. Rottgering and M. J. Hardcastle and J. Petley and F. La Franca and K. Rubinur and Y. Toba and Y. Zhong and M. Mezcua and G. Zamorani and F. Shankar and B. Altieri and S. Andreon and N. Auricchio and C. Baccigalupi and M. Baldi and S. Bardelli and A. Biviano and E. Branchini and M. Brescia and J. Brinchmann and S. Camera and G. Canas-Herrera and V. Capobianco and C. Carbone and J. Carretero 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 G. De Lucia and A. M. Di Giorgio and H. Dole and F. Dubath and C. A. J. Duncan and X. Dupac and S. Dusini and S. Escoffier and M. Farina and R. Farinelli and F. Faustini and S. Ferriol and F. Finelli 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 J. Gracia-Carpio and A. Grazian and F. Grupp and S. V. H. Haugan and J. Hoar and W. Holmes and I. M. Hook and F. Hormuth and A. Hornstrup and K. Jahnke and M. Jhabvala and B. Joachimi and E. Keihanen and S. Kermiche and A. Kiessling and B. Kubik and M. Kummel and H. Kurki-Suonio and A. M. C. Le Brun 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 O. Marggraf and M. Martinelli and N. Martinet and F. Marulli and R. J. Massey and E. Medinaceli and S. Mei 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 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 A. Renzi and J. Rhodes and G. Riccio and E. Romelli and M. Roncarelli and R. Saglia and Z. Sakr and D. Sapone and B. Sartoris and M. Schirmer and P. Schneider and T. Schrabback 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-Crespi 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 G. Verdoes Kleijn and A. Veropalumbo and Y. Wang and J. Weller and E. Zucca and M. Huertas-Company and V. Scottez},
journal= {arXiv preprint arXiv:2511.02970},
year = {2025}
}
备注
22 pages, 16 figures, submitted to A&A