Possible evidence of a universal radio/X-ray correlation in a near-complete sample of hard X-ray selected seyfert galaxies
Possible evidence of a universal radio/X-ray correlation in a near-complete sample of hard X-ray selected seyfert galaxies
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在硬 X 射线选择的赛弗特星系的近乎完整样本中存在普遍射电/X 射线相关性的可能证据
DOI：
10.1093/mnras/stab521
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发表时间：
2021-02
期刊：
影响因子：
--
通讯作者：
Wang X.
中科院分区：
文献类型：
--
作者：
Chang N.;Xie F. G.;Liu X.;Ho L. C.;Dong A. J.;Han Z. H.;Wang X.
由于圆盘-喷射耦合可能取决于被探测源的各种性质，因此样品控制一直是一项重要但具有挑战性的任务。在这项工作中，我们重新分析了塞弗特星系的硬X射线选择样本。我们只考虑以黑洞(BH)质量以及射电和X射线光度为测量单位的源。我们最终的样本包括(在最初的79个来源中)，既有明亮的活动星系核，也有低光度的。2-10keV X射线爱丁顿比LX/LED位于∼10−4.5和∼10−0.5之间。我们首先发现，由于LHX/LX分布的相似性，射电响亮的Seyferts的X射线起源可能与射电安静(RQ)的相同，我们将其归因于热吸积流(或类似的日冕)。然后，我们研究无线电和X射线中的光度之间的联系。由于我们的样本遭受了BH质量MBH依赖于LX/LEdd的选择偏差，我们重点研究了射电(在1.4千兆赫)与爱丁顿单位X射线光度之间的相关斜率ξX，即。我们根据不同的性质对信号源进行分类，即1)Seyfert分类，2)射电响度，3)射电形态。我们发现，尽管在分类上存在这些差异，但我们样本中的所有来源都符合通用相关斜率ξX(注意归一化可能不同)，ξX=0.77±0.10。考虑到RQ系统中各种可能的无线电发射器，这是意想不到的。对于喷流(无论是相对论的强准直的，还是亚相对论的弱准直的)解释，我们的结果可能表明在所有的塞弗特星系中都存在一种共同的、通用的、但尚未确定的喷流发射机制，而像BH自旋和磁场强度这样的性质只起到次要作用。我们进一步估计了塞弗特星系的喷流生产效率ηJET，这是一个平均值。我们还发现，随着系统变得更弱，η的喷射也会增加。还讨论了RQ系统中无线电发射的替代方案。
Because the disc–jet coupling likely depends on various properties of sources probed, the sample control is always an important but challenging task. In this work, we re-analysed theINTEGRALhard X-ray-selected sample of Seyfert galaxies. We only consider sources that have measurements in black hole (BH) mass, and luminosities in radio and X-rays. Our final sample includes 64 (out of the original 79) sources, consists of both bright active galactic nucleus and low-luminosity ones. The 2–10 keV X-ray Eddington ratioLX/LEddlocates in the range between ∼10−4.5and ∼10−0.5. We first find that, because of the similarity in theLHX/LXdistribution, the X-ray origin of radio-loud Seyferts may be the same to that of radio-quiet (RQ) ones, where we attribute to the hot accretion flow (or similarly, the corona). We then investigate the connections between luminosities in radio and X-rays. Since our sample suffers a selection bias of a BH massMBHdependence onLX/LEdd, we focus on the correlation slope ξXbetween the radio (at 1.4 GHz) and X-ray luminosities in Eddington unit, i.e.. We classify the sources according to various properties, i.e. 1) Seyfert classification, 2) radio loudness, and 3) radio morphology. We find that, despite these differences in classification, all the sources in our sample are consistent with a universal correlation slope ξX(note that the normalization may be different), with ξX= 0.77 ± 0.10. This is unexpected, considering various possible radio emitters in RQ systems. For the jet (either relativistic and well collimated, or sub-relativistic and weakly collimated) interpretation, our result may suggest a common/universal but to be identified jet launching mechanism among all the Seyfert galaxies, while properties like BH spin and magnetic field strength only play secondary roles. We further estimate the jet production efficiency ηjetof Seyfert galaxies, which ison average. We also find that ηjetincreases as the system goes fainter. Alternative scenarios for the radio emission in RQ systems are also discussed.
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DOI：
10.1111/j.1365-2966.2009.15837.x
发表时间：
2009-11
影响因子：
4.8
作者：
M. Orienti;M. Prieto;Iac;Inaf-Ira;Bologna
通讯作者：
M. Orienti;M. Prieto;Iac;Inaf-Ira;Bologna
影响因子：
4.8
作者：
B. Mishra;M. Begelman;P. Armitage;J. Simon
通讯作者：
B. Mishra;M. Begelman;P. Armitage;J. Simon
影响因子：
4.8
作者：
K. Smith;R. Mushotzky;M. Koss;B. Trakhtenbrot;C. Ricci;C. Ricci;O. I. Wong;F. Bauer;F. Bauer;F. Bauer;F. Ricci;S. Vogel;D. Stern;M. Powell;C. M. Urry;F. Harrison;J. Mejía-restrepo;K. Oh;K. Oh;J. Baek;A. Chung
通讯作者：
K. Smith;R. Mushotzky;M. Koss;B. Trakhtenbrot;C. Ricci;C. Ricci;O. I. Wong;F. Bauer;F. Bauer;F. Bauer;F. Ricci;S. Vogel;D. Stern;M. Powell;C. M. Urry;F. Harrison;J. Mejía-restrepo;K. Oh;K. Oh;J. Baek;A. Chung
影响因子：
6
作者：
H. Netzer
通讯作者：
H. Netzer
DOI：
10.3847/1538-4357/ab7930
发表时间：
2018-05
期刊：
The Astrophysical Journal
影响因子：
--
作者：
A. Wójtowicz;Ł. Stawarz;E. Kosmaczewski
通讯作者：
A. Wójtowicz;Ł. Stawarz;E. Kosmaczewski