发表机构
Shanghai Astronomical Observatory, Chinese Academy of Sciences; Institute for Astronomy, School of Physics, Zhejiang University; Institute of Science and Technology for Deep Space Exploration, Suzhou Campus, Nanjing University; CSIRO Space and Astronomy; IPAC, Caltech; School of Physics & Astronomy, University of Southampton; Institute of Space Sciences (ICE, CSIC)（中国科学院上海天文台; 浙江大学物理学院天体物理研究所; 南京大学苏州校区深空探测研究院; 澳大利亚联邦科学与工业研究组织空间与天文部; 加州理工学院红外科学处理中心; 南安普顿大学物理与天文学院; 空间科学研究所（加泰罗尼亚高等研究理事会））
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究推出IMBH-RM项目，构建含192个近邻活动宽线IMBH的均匀样本，计划通过混响测绘测量黑洞质量，以校准质量估计、扩展标度关系并约束黑洞种子形成场景。
AI 中文摘要
詹姆斯·韦布空间望远镜近期在高红移处发现大质量黑洞，凸显了黑洞种子形成以及黑洞与其宿主星系共同演化的基本问题。由于初始种子星系群无法直接观测，近邻中等质量黑洞（IMBH）提供了黑洞形成与早期增长的互补化石记录。受此机遇驱动，我们推出中等质量黑洞混响测绘（IMBH-RM）项目，通过采用一致的光谱分解与黑洞质量估计方法，对文献中的候选体进行统一重分析，构建了均匀的斯隆数字巡天活动宽线IMBH样本。该样本包含192个z≲0.3的可靠IMBH候选体，其log(M_BH/M_⊙)<6，其中4个候选体的log(M_BH/M_⊙)<5，极具研究价值。IMBH-RM的主要目标是对精心选取的子样本，通过直接测量宽线区与吸积盘的特征尺寸获取可靠的黑洞质量，这些测量将为校准单历元黑洞质量估计提供稳健的低质量锚点，并将黑洞-星系标度关系扩展至IMBH领域。通过构建涵盖10^4-10^6 M_⊙的具有统计意义的混响测绘样本，我们旨在约束本地IMBH质量分布，并对相互竞争的黑洞种子形成场景施加观测约束。中国空间站巡天望远镜上的未来多通道成像仪为实现这些目标提供了极具前景的平台。
英文摘要
Recent discoveries with the James Webb Space Telescope of massive black holes at high redshift have highlighted fundamental questions about black hole seed formation and the coevolution of black holes with their host galaxies. Because the initial seed population cannot yet be observed directly, nearby intermediate-mass black holes provide a complementary fossil record of black hole formation and early growth. Motivated by this opportunity, we present the Intermediate-Mass Black Hole Reverberation Mapping (IMBH-RM) project and construct a homogeneous Sloan Digital Sky Survey sample of active broad-line IMBHs by uniformly reanalyzing literature candidates with consistent spectral decomposition and black hole mass estimation. Our sample contains 192 reliable IMBH candidates at $z\lesssim0.3$ with $\log(M_{\rm BH}/M_\odot)<6$, including four particularly compelling sources with $\log(M_{\rm BH}/M_\odot)<5$. The primary goal of IMBH-RM is to obtain reliable black hole masses from direct measurements and characteristic sizes of the broad-line region and accretion disk for a carefully selected subsample. These measurements will provide robust low-mass anchors for calibrating single-epoch black hole mass estimates and extending black hole--galaxy scaling relations into the IMBH regime. By building a statistically meaningful reverberation-mapped sample spanning $10^4-10^6\,M_\odot$, we aim to constrain the local IMBH mass distribution and place observational constraints on competing black hole seed formation scenarios. The future Multi-Channel Imager aboard the Chinese Space-station Survey Telescope provides a particularly promising platform for achieving these goals.
Comments37 pages, 14 figures, and 6 tables. Comments are welcome. The IMBH catalog is available at https://github.com/legolason/IMBH_catalog
