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arXiv 2412.09451astro-ph.HE
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活动星系核中吸积盘倾角与宽线区的关系

On the Relation between the Inclination Angle of the Accretion Disk and the Broad-line Region in Active Galactic Nuclei

Rong Du, Luis C. Ho, Yuanze Ding, Ruancun Li

AI总结:

本研究通过分析8个活动星系核的X射线观测数据,发现宽线区倾角与吸积盘倾角之间存在强正相关,表明两者可能存在物理共准。

摘要:

活动星系核模型通常假设宽线区与吸积盘之间存在密切的物理联系。我们通过研究宽线区倾角($θ_\mathrm{BLR}$)与内吸积盘倾角($θ_\mathrm{disk}$)之间的关系来评估这一理论预期。对于8个具有已发表 $θ_\mathrm{BLR}$ 值的活动星系核样本(这些值基于速度分辨的反响映射实验对宽线区进行动力学建模估算得出),我们分析了高质量的 XMM-Newton 和 NuSTAR 联合 X 射线观测数据,通过宽带(0.3--78\\,keV)反射光谱学推导出新的、稳健的 $θ_\mathrm{disk}$ 测量值。我们发现 $θ_\mathrm{BLR}$ 与 $θ_\mathrm{disk}$ 之间存在强正相关(皮尔逊相关系数 0.856,$p$ 值 0.007),尽管蒙特卡洛模拟表明显著性水平仅为边际显著($<3\\,σ$)。尽管如此,$θ_\mathrm{BLR}$ 与 $θ_\mathrm{disk}$ 之间近乎线性的关系表明吸积盘与宽线区之间可能存在物理共准。未来需要更大且更均匀的样本来确认这种相关性,并完善我们对活动星系核中心区域结构和动力学的理解。

英文摘要:

Models of active galactic nuclei often invoke a close physical association between the broad-line region and the accretion disk. We evaluate this theoretical expectation by investigating the relationship between the inclination angle of the BLR ($θ_\mathrm{BLR}$) and the inclination angle of the inner accretion disk ($θ_\mathrm{disk}$). For a sample of eight active galactic nuclei that have published values of $θ_\mathrm{BLR}$ estimated from dynamical modeling of the BLR based on velocity-resolved reverberation mapping experiments, we analyze high-quality, joint XMM-Newton and NuSTAR X-ray observations to derive new, robust measurements of $θ_\mathrm{disk}$ through broadband (0.3--78\,keV) reflection spectroscopy. We find a strong, positive correlation between $θ_\mathrm{BLR}$ and $θ_\mathrm{disk}$ (Pearson correlation coefficient 0.856, $p$-value 0.007), although Monte Carlo simulations indicate that the level of significance is only marginal ($<3\,σ$). Nevertheless, the nearly linear relation between $θ_\mathrm{BLR}$ and $θ_\mathrm{disk}$ suggests of a possible physical alignment between the accretion disk and the BLR. Future studies with a larger and more homogeneous sample are needed to confirm the correlation and refine our understanding of the structure and dynamics of the central regions of active galaxies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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