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arXiv 1002.0544astro-ph.HE
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AGN吸积盘流出物II X射线谱的多维模拟

Multi-dimensional modelling of X-ray spectra for AGN accretion-disk outflows II

S. A. Sim, L. Miller, K. S. Long, T. J. Turner, J. N. Reeves

摘要:

高度电离的快吸积盘风被认为是活动星系核X射线谱中观测到的各种吸收和发射特征的一种解释。简单的估计表明,这些流动的质量可能足以带走相当大一部分的吸积能量,并可能参与创造超大质量黑洞和它们的宿主星系之间的联系。然而,测试这些假设,并量化流出签名,需要高质量的理论光谱与观测比较。在这里,我们描述了我们的Monte Carlo辐射转移代码的扩展,使我们能够产生更广泛的各种磁盘风模型比可能在我们以前的工作现实的理论光谱。特别是,我们已经扩大了由代码模拟的原子物理学的范围,使L-和M-壳层离子现在可以包括在内。我们还大大改进了电离和辐射加热的处理,使我们现在能够计算包含更多样化等离子体条件的流出物的光谱。我们提出的例子计算,说明了各种参数化流出模型预测的光谱特征,并证明其适用性的解释数据的比较与明亮的类星体PG 1211 +143的观测。我们发现,在观察到的2 - 10 keV的光谱,这个对象的主要功能可以很好地再现我们的光谱,确认它可能拥有一个大规模的外流。

英文摘要:

Highly-ionized fast accretion-disk winds have been suggested as an explanation for a variety of observed absorption and emission features in the X-ray spectra of Active Galactic Nuclei. Simple estimates have suggested that these flows may be massive enough to carry away a significant fraction of the accretion energy and could be involved in creating the link between supermassive black holes and their host galaxies. However, testing these hypotheses, and quantifying the outflow signatures, requires high-quality theoretical spectra for comparison with observations. Here we describe extensions of our Monte Carlo radiative transfer code that allow us to generate realistic theoretical spectra for a much wider variety of disk wind models than possible in our previous work. In particular, we have expanded the range of atomic physics simulated by the code so that L- and M-shell ions can now be included. We have also substantially improved our treatment of both ionization and radiative heating such that we are now able to compute spectra for outflows containing far more diverse plasma conditions. We present example calculations that illustrate the variety of spectral features predicted by parametrized outflow models and demonstrate their applicability to the interpretation of data by comparison with observations of the bright quasar PG1211+143. We find that the major features in the observed 2 - 10 keV spectrum of this object can be well-reproduced by our spectra, confirming that it likely hosts a massive outflow.

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