The jet–disc connection in AGN
The jet–disc connection in AGN
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DOI：
10.1093/mnras/stu1759
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发表时间：
2014-05
期刊：
影响因子：
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通讯作者：
T. Sbarrato;P. Padovani;G. Ghisellini
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文献类型：
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作者：
T. Sbarrato;P. Padovani;G. Ghisellini
摘要本文给出了相对论喷流吸积率与功率之间关系的最新结果。为了达到这个目的，我们使用耀变体，它的喷流指向我们，有着可见的宽发射线，沿着宽的无线射电星系。我们跟踪喷流功率与两个代理（伽马射线和无线电光度），而广泛的发射线是吸积盘光度的直接测量。我们发现，在耀变体中的宽发射线和伽马射线或光度之间存在相关性，这表明喷流和吸积率之间存在直接的紧密联系。只有将我们的分析扩展到射电星系，并使用射电光度作为喷流示踪剂，我们最终能够得出结论，喷流AGN可以通过一个辐射有效的吸积盘和热吸积流吸积，取决于吸积率。最后，我们观察到了喷流活动星系核族中两种状态之间的转变。
Abstract We present our latest results on the connection between the accretion rate and the power of relativistic jets. To this aim we use blazars, whose jet is pointing at us, with visible broad emission lines, along with broad lineless radio–galaxies. We trace the jet power with two proxies (gamma–ray and radio luminosities), while the broad emission lines are a direct measure of the accretion disc luminosity. We find a correlation between the broad emission line and the gamma–ray or luminosities in blazars, suggesting a direct tight connection between the jet and the accretion rate. Only extending our analysis to radio–galaxies, and using as jet tracer the radio luminosity, we are finally able to conclude that jetted AGN can accrete both through a radiatively efficient accretion disc and a hot accretion flow, depending on the accretion rate. We finally observe the transition between the two states among the family of jetted AGN.