发表机构
INAF Osservatorio Astronomico di Roma; Center for Astrophysics | Harvard & Smithsonian; NASA Goddard Space Flight Center; Astronomical Observatory of the Jagiellonian University; NASA Marshall Space Flight Center（罗马天文台; 哈佛-史密森天体物理中心; 戈达德太空飞行中心; 亚盖隆大学天文台; 马歇尔太空飞行中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究利用钱德拉的高分辨率，对20个伴延展辐射的本地重度遮蔽AGN样本开展空间分辨光谱分析，明确了核区与延展区的光谱特性及系统径向变化，为相关AGN的X射线特性建立了统一基线。
AI 中文摘要
钱德拉X射线天文台已揭示，在本地宇宙中，千秒差距尺度的延展X射线辐射通常与重度吸收（氢柱密度对数log(N_H/cm⁻²) > 23）的活动星系核（AGN）相关。我们对一组经深度（>100千秒）钱德拉/ACIS曝光观测的近邻遮蔽AGN样本开展了均质的空间分辨光谱分析，所有样本均伴随核外延展辐射。利用钱德拉的亚角秒分辨率，我们将未分辨的核区辐射与物理上不同的延展区域分离，并使用光致电离和热等离子体成分对其光谱建模。延展辐射的光谱较为复杂，在多数区域需要结合光致电离与碰撞电离成分；光谱参数呈现系统的径向变化，核区通常具有更高柱密度和更高电离度的成分，而延展区域的范围同样较宽但相互重叠，无简单单调的径向演化。在20个源中，19个检测到超出核区点扩散函数（PSF）溢散的硬（>3千电子伏）X射线辐射，12个系统观测到延展的铁Kα辐射。这些结果为重度遮蔽AGN的X射线特性建立了统一基线，并为本地宇宙中AGN驱动反馈的几何结构与物理条件提供了约束。
英文摘要
The Chandra X-ray Observatory has revealed that kiloparsec-scale extended X-ray emission is commonly associated with heavily absorbed ($\log (N_{H}$/cm$^{-2})\,>\, 23$) Active Galactic Nuclei (AGN) in the local Universe. We present a homogeneous spatially resolved spectral analysis of a sample of nearby obscured AGN observed with deep ($>100$~ks) Chandra/ACIS exposures and all associated with extra-nuclear extended emission. Exploiting the sub-arcsecond resolution of Chandra, we separate unresolved nuclear emission from physically distinct extended regions and model their spectra using photoionized and thermal plasma components. The extended emission is spectrally complex, requiring a combination of photoionized and collisionally ionized components in most regions. The spectral parameters exhibit systematic radial variations, with nuclear regions typically hosting higher-column and higher-ionization components, while extended regions span similarly broad but overlapping ranges without a simple monotonic radial progression. Hard ($>3$ keV) X-ray emission in excess of nuclear PSF spillover is detected in 19/20 sources, while extended Fe~K$α$ emission is observed in 12/20 systems. These results establish a uniform baseline for the X-ray properties of heavily obscured AGN and provide constraints on the geometry and physical conditions of AGN-driven feedback in the local Universe.
Commentsaccepted in ApJ, 62 pages, 31 figures
