X-ray absorption lines suggest matter infalling onto the central black-hole of Mrk 509
X-ray absorption lines suggest matter infalling onto the central black-hole of Mrk 509
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X 射线吸收线表明物质落入 Mrk 509 的中央黑洞
DOI：
10.1051/0004-6361:20042487
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发表时间：
2005
影响因子：
6.5
通讯作者：
Romé
中科院分区：
文献类型：
--
作者：
M. Dadina;M. Cappi;G. Malaguti;G. Ponti;A. D. R. Iasfinaf;B. U. O. B. IoA;Cambridge;UK IASF;Romé
本文报道了在Seyfert 1星系Mrk 509的X射线光谱中由于Fe离子化而引起的吸收线的红移和蓝移的证据。这些特征在短至~20千秒的时间尺度上似乎是短暂的，已经用两颗不同的卫星BeppoSAX和XMM-牛顿观测到。红移和蓝移的线被发现在$E\sim5.5$ keV和~8.1-8.3 keV（静止帧），分别。第一个是在BeppoSAX号卫星六次观测中的一次观测中看到的，后一个是两颗卫星都看到的。在假设吸收是由于H-或He-类铁的情况下，吸收物质的隐含速度为$v\sim0.15{-}0.2$ c，在向外和向内的方向上。根据目前的数据，不能排除关于~5.5 keV线的引力红移的另一种解释。然而，我们认为，时间模式和零星性质的线更容易调和与模型预测重要的径向运动接近中央黑洞，如“流产喷流”模型，“雷雨云”模型，或磁流体动力学模型的喷气机和吸积盘。
Evidence for both red- and blue-shifted absorption lines due to ionized Fe in the X-ray spectrum of the Seyfert 1 galaxy Mrk 509 is reported. These features appear to be transient on time-scales as short as ~20 ks, and have been observed with two different satellites, BeppoSAX and XMM-Newton . The red- and blue-shifted lines are found at $E\sim5.5$ keV and ~8.1–8.3 keV (rest-frame), respectively. The first is seen in one out of six BeppoSAX observations, the latter is seen by both satellites. Under the assumption that the absorption is due to either H- or He-like Iron, the implied velocities for the absorbing matter are $v\sim0.15{-}0.2$ c, in both outward and inward directions. An alternative explanation in terms of gravitational red-shift for the ~5.5 keV line cannot be ruled out with the current data. We argue, however, that the temporal patterns and sporadic nature of the lines are more easily reconciled with models that predict important radial motions close to the central black hole, such as the “aborted jet” model, the “thundercloud” model, or magneto-hydrodynamical models of jets and accretion-disks.
DOI：
10.1046/j.1365-8711.2003.07006.x
发表时间：
2003-03
影响因子：
4.8
作者：
K. Pounds;J. Reeves;A. King;K. Page;P. O’Brien;M. W. D. O. PhysicsAstronomy;U. Leicester;Laboratory for Multiwavelength Astrophysics;Nasa Gsfc
通讯作者：
K. Pounds;J. Reeves;A. King;K. Page;P. O’Brien;M. W. D. O. PhysicsAstronomy;U. Leicester;Laboratory for Multiwavelength Astrophysics;Nasa Gsfc