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arXiv 1504.07950astro-ph.HE
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NGC 4151的NuSTAR和Suzaku X射线能谱:来自内吸积盘反射的证据

NuSTAR and Suzaku X-ray Spectroscopy of NGC 4151: Evidence for Reflection from the Inner Accretion Disk

M. L. Keck, L. W. Brenneman, D. R. Ballantyne, F. Bauer, S. E. Boggs, F. E. Christensen, W. W. Craig, T. Dauser, M. Elvis, A. C. Fabian, F. Fuerst, J. García, B… 展开作者

M. L. Keck, L. W. Brenneman, D. R. Ballantyne, F. Bauer, S. E. Boggs, F. E. Christensen, W. W. Craig, T. Dauser, M. Elvis, A. C. Fabian, F. Fuerst, J. García, B. W. Grefenstette, C. J. Hailey, F. A. Harrison, G. Madejski, A. Marinucci, G. Matt, C. S. Reynolds, D. Stern, D. J. Walton, A. Zoghbi

摘要:

我们提出的X射线定时和光谱分析的同步150千秒核光谱望远镜阵列(NuSTAR)和朱雀X射线观测的塞弗特1.5星系NGC 4151。本文采用内吸积盘反射和吸收主导模型,研究了活动星系核的连续辐射、吸收和反射特性。通过时均光谱分析,我们发现了来自内吸积盘的相对论反射的有力证据。我们发现,相对论辐射来自一个高度电离的内吸积盘与陡峭的发射率的轮廓,这表明一个强烈的,紧凑的照明源。我们发现一个初步的,接近最大的黑洞自旋a>0.9统计和系统的建模误差。我们发现一个相对温和的反射率相对于预测的灯柱几何形状,其中照明电晕建模为点源。通过时间分辨光谱分析,我们发现,适度的日冕和内盘反射通量的变化驱动的光谱变化在观测过程中。我们讨论了各种物理场景的内盘反射模型,我们发现,一个紧凑的日冕是与观测到的功能。

英文摘要:

We present X-ray timing and spectral analyses of simultaneous 150 ks Nuclear Spectroscopic Telescope Array (NuSTAR) and Suzaku X-ray observations of the Seyfert 1.5 galaxy NGC 4151. We disentangle the continuum emission, absorption, and reflection properties of the active galactic nucleus (AGN) by applying inner accretion disk reflection and absorption-dominated models. With a time-averaged spectral analysis, we find strong evidence for relativistic reflection from the inner accretion disk. We find that relativistic emission arises from a highly ionized inner accretion disk with a steep emissivity profile, which suggests an intense, compact illuminating source. We find a preliminary, near-maximal black hole spin a>0.9 accounting for statistical and systematic modeling errors. We find a relatively moderate reflection fraction with respect to predictions for the lamp post geometry, in which the illuminating corona is modeled as a point source. Through a time-resolved spectral analysis, we find that modest coronal and inner disk reflection flux variation drives the spectral variability during the observations. We discuss various physical scenarios for the inner disk reflection model, and we find that a compact corona is consistent with the observed features.

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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