标题： AGN 三重合并的三重性：暗弱X射线点源的检测 显示英文标题

标题： AGN Triality of Triple Mergers: Detection of Faint X-ray Point Sources

摘要： 我们展示了对附近（z<0.077）三重星系合并中首次系统搜索三重AGN的X射线分析结果。 我们分析了档案中的钱德拉观测数据，共7个三重星系合并，使用BAYMAX（X射线中多个AGN的贝叶斯分析），为每个观测数据拟合单源、双源和三源X射线点源模型。 据此，我们得出结论：1个三重合并有一个X射线点源（SDSS J0858+1822，尽管它不太可能是AGN）；5个三重合并可能由两个X射线点源组成（NGC 3341，SDSS J1027+1749，SDSS J1631+2352，SDSS J1708+2153，以及SDSS J2356$-$1016）；1个系统由三个X射线点源组成（SDSS J0849+1114）。 通过拟合每个点源的单独X射线光谱，我们分析了2-7 keV的光度以及与每个潜在AGN相关的遮蔽水平。 我们发现，在5个双X射线点源系统中，主点源和次点源具有明亮的X射线光度（L_2-7 kev >10^40 erg s^-1），可能与4个新的未检测到的双AGN有关。 双源和三源系统被发现物理分离距离在3-9 kpc之间，流量比在2x10^-3 - 0.84之间。 本文中发现的X射线点源的起源的多波段分析在我们的附带论文（Foord等，2020c）中进行了介绍。 显示英文摘要

摘要： We present results from our X-ray analysis of the first systematic search for triple AGN in nearby (z<0.077) triple galaxy mergers. We analyze archival Chandra observations of 7 triple galaxy mergers with BAYMAX (Bayesian Analysis of Multiple AGN in X-rays), fitting each observation with single, dual, and triple X-ray point source models. In doing so, we conclude that 1 triple merger has one X-ray point source (SDSS J0858+1822, although it's unlikely to be an AGN); 5 triple mergers are likely composed of two X-ray point sources (NGC 3341, SDSS J1027+1749, SDSS J1631+2352, SDSS J1708+2153, and SDSS J2356$-$1016); and one system is composed of three X-ray point sources (SDSS J0849+1114). By fitting the individual X-ray spectra of each point source, we analyze the 2-7 keV luminosities as well as the levels of obscuration associated with each potential AGN. We find that 4/5 dual X-ray point source systems have primary and secondary point sources with bright X-ray luminosities (L_2-7 kev >10^40 erg s^-1), possibly associated with 4 new undetected dual AGN. The dual and triple point source systems are found to have physical separations between 3-9 kpc and flux ratios between 2x10^-3 - 0.84. A multi-wavelength analysis to determine the origin of the X-ray point sources discovered in this work is presented in our companion paper (Foord et al. 2020c).