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arXiv 2610.02470astro-ph.GA

X射线表征宇宙网(COSMOS-Web)中的星系群与希克森致密群至红移z~3.8 I. X射线光度函数演化

X-ray Characterization of Galaxy Groups and Hickson Groups in COSMOS-Web to z~3.8 I. X-ray Luminosity Function Evolution

Ghassem Gozaliasl, Günther Hasinger, Gavin Leroy, Alexis Finoguenov, Fatemeh Abedini, Hollis B. Akins, Rafael C. Arango-Toro, Arif Babul, Caitlin M. Casey, Nico… 展开作者

Ghassem Gozaliasl, Günther Hasinger, Gavin Leroy, Alexis Finoguenov, Fatemeh Abedini, Hollis B. Akins, Rafael C. Arango-Toro, Arif Babul, Caitlin M. Casey, Nicole E. Drakos, Andreas L. Faisst, Carter Flayhart, Maximilien Franco, Zohreh Ghaffari, Santosh Harish, Hossein Hatamnia, Olivier Ilbert, Jeyhan S. Kartaltepe, Ali Ahmad Khostovan, Maarit Korpi-Lagg, Ronaldo Laishram, Daizhong Liu, Matteo Maturi, Henry Joy McCracken, Jed McKinney, Nicolas McMahon, Lauro Moscardini, Mahdiyar Mousavi-Sadr, Jason Rhodes, Brant E. Robertson, Louise Paquereau, Rasha M. Samir, Mark Sargent, Diana Scognamiglio, Marko Shuntov, Greta Toni, Francesco Ubertosi, Eleni Vardoulaki

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中文总结 AI 辅助

本文利用Chandra和XMM-Newton数据对COSMOS-Web中1678个星系群和993个希克森致密群进行均匀X射线表征,发现X射线光度函数特征光度随红移单调上升约2个数量级,并公开释放测量结果。

中文摘要 AI 辅助

星系群是宇宙中占主导地位的暗晕环境,也是研究反馈和气体循环物理的灵敏实验室,然而,对星系群种群进行均匀的中等红移X射线表征一直受到深广域成像数据可用性的限制。我们提出了对COSMOS-Web星系群种群的均匀X射线表征:1,678个星系群(CW-All),这些星系群是通过将AMICO算法应用于JWST选择的COSMOS-Web测光星表($0.08 \lesssim z \lesssim 3.7$)而识别出的;以及一个平行的993个希克森致密群样本(CW-HCG;$0.08 \lesssim z \lesssim 3.82$),覆盖$0.45~\mathrm{deg}^2$天区。我们将统一的孔径测光X射线处理流程应用于Chandra和XMM-Newton的COSMOS组合马赛克图像,测量了每个星系群的流量、光度、温度、暗晕质量和半径,同时给出了探测结果、上限和质量标志。我们在信噪比SNR~$\geq 2.0$下探测到499个CW-All星系群(占29.7%)和332个CW-HCG星系群(占33.4%)的X射线辐射,并给出了四个红移区间的X射线光度函数。特征光度$L^\star$在两个星表中均从最低红移区间到最高红移区间单调上升约1.9--2.1个数量级,这一趋势在两种独立的交叉检验分箱方案下依然存在,且无法用探测种群的暗晕质量或富度选择效应来解释。针对$2.50 \lesssim z < 3.09$范围内AmicOne原星系团候选体的弥散X射线辐射的定向搜索,在当前深度下未发现具有统计显著性的信号。我们公开发布了这两个星表的X射线测量结果和推导性质。

英文摘要

Galaxy groups are the dominant halo environment in the Universe and a sensitive laboratory for feedback and gas-cycling physics, yet a uniform, intermediate-redshift X-ray characterization of the group population has been limited by the availability of deep, wide-area imaging. We present a uniform X-ray characterization of the COSMOS-Web galaxy group population: 1,678 groups (CW-All) identified with the AMICO algorithm applied to the JWST-selected COSMOS-Web photometric catalog ($0.08 \lesssim z \lesssim 3.7$), and a parallel sample of 993 Hickson compact groups (CW-HCG; $0.08 \lesssim z \lesssim 3.82$) over $0.45~\mathrm{deg}^2$. We apply a uniform aperture-photometry X-ray pipeline to the combined Chandra and XMM-Newton COSMOS mosaic, measuring fluxes, luminosities, temperatures, and halo masses and radii for every group, together with detections, upper limits, and quality flags. We detect X-ray emission from 499 CW-All groups (29.7\%) and 332 CW-HCG groups (33.4\%) at SNR~$\geq 2.0$, and present the X-ray luminosity function in four redshift bins. The characteristic luminosity $L^\star$ rises monotonically by $\sim$1.9--2.1~dex from the lowest to highest redshift bin in both catalogs, a trend that persists under two independent cross-check binning schemes and is not explained by mass or richness selection of the detected population. A targeted search for diffuse X-ray emission from the AmicOne protocluster candidate at $2.50 \lesssim z < 3.09$ finds no statistically significant signal at the current depth. We publicly release the X-ray measurements and derived properties for both catalogs.

发表机构

  • Aalto University(阿尔托大学)
  • University of Helsinki(赫尔辛基大学)
  • Deutsches Zentrum für Astrophysik(德国天体物理中心)
  • TU Dresden(德累斯顿工业大学)
  • DESY(德国电子同步辐射实验室)
  • Durham University(杜伦大学)
  • Institute for Advanced Studies in Basic Sciences (IASBS)(基础科学高等研究院)
  • The University of Texas at Austin(德克萨斯大学奥斯汀分校)
  • Aix Marseille Univ(艾克斯-马赛大学)
  • CNRS(法国国家科学研究中心)
  • University of Victoria(维多利亚大学)

机构由 AI 辅助整理,请以论文原文为准。

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