发表机构
Institute of Space Sciences (ICE, CSIC); Institut d’Estudis Espacials de Catalunya (IEEC); California Institute of Technology; The Catholic University of America; INAF-Osservatorio Astronomico di Brera; Università di Trento; NASA Goddard Space Flight Center; Columbia University; Saint Mary’s University; Clemson University(空间科学研究所(ICE, CSIC); 加泰罗尼亚空间研究学院(IEEC); 加州理工学院; 美国天主教大学; 意大利国家天体物理研究所-布雷拉天文台; 特伦托大学; NASA戈达德太空飞行中心; 哥伦比亚大学; 圣玛丽大学; 克莱姆森大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
该研究在宇宙正午类星体WISEA J094835.95+432302.6的XMM-Newton光谱中发现两个高置信度吸收特征,可能源于视速度0.37c的超快内流,为黑洞峰值吸积研究提供罕见样本。
AI 中文摘要
宇宙正午($z\sim2$)标志着宇宙恒星形成和黑洞吸积活动的峰值时期,此时预计存在强烈的吸积和外流。我们报告了在类星体 WISEA~J094835.95+432302.6(红移 $z=1.893$)的 \textit{XMM-Newton} 光谱中探测到两个候选吸收特征。两个红移特征出现在静止系能量约 $\sim4.65$ 和 $\sim5.75$ keV 处,置信度分别为 99.3% 和 94.1%,该置信度通过考虑 look-elsewhere 效应的蒙特卡洛(MC)模拟估算。这些特征可解释为来自一个视速度 $0.37^{+0.02}_{-0.01}c$ 的超快内流(UFI)的 Fe XXV/XXVI K 壳层跃迁。若后续 \textit{XMM-Newton} 观测证实,这些探测将把已报告的 UFI 候选体从本地宇宙扩展到宇宙正午,为黑洞在其增长峰值期的吸积提供罕见的实验场所。
英文摘要
Cosmic noon ($z\sim2$) marks the peak epoch of cosmic star formation and black hole accretion activity, where strong accretion and outflows are expected. We report two candidate absorption features in the \textit{XMM-Newton} spectrum of the quasar WISEA~J094835.95+432302.6 at $z=1.893$. Two redshifted features occur at rest-frame energies of $\sim4.65$ and $\sim5.75$keV with confidence levels of 99.3% and 94.1%, respectively, estimated from Monte Carlo (MC) simulations considering the look-elsewhere effect. These features can be explained by the Fe XXV/XXVI K-shell transitions from one ultra-fast inflow (UFI) with an apparent velocity of $0.37^{+0.02}_{-0.01}c$. If confirmed by follow-up \textit{XMM-Newton} observations, these detections would extend reported UFI candidates from the local Universe to cosmic noon, offering a rare laboratory for black hole accretion at the peak of their growth.
Comments6 pages, 7 figures, 1 table, submitted