Constraints on the Composition, Magnetization, and Radiative Efficiency in the Jets of Blazars
Constraints on the Composition, Magnetization, and Radiative Efficiency in the Jets of Blazars
复制标题
耀变体喷流成分、磁化强度和辐射效率的约束
DOI：
10.3847/1538-4357/aac959
复制
发表时间：
2018-05
影响因子：
4.9
通讯作者：
Liao Neng Hui
中科院分区：
文献类型：
--
作者：
Fan Xu Liang;Wu Qingwen;Liao Neng Hui
射流中的成分和能量耗散是射流物理学中尚未完全理解的两个基本问题。在本文中，我们试图约束的组成，磁化和辐射效率的耀变体与最近发布的低频射电目录的TIFR GMRT巡天在150 MHz。由低频射电辐射估算的喷流功率远低于假设一个质子一个电子的谱能量分布拟合得到的喷流功率，假设低频射电辐射估算的喷流功率是物理的，则电子/正电子对的比例可以用n对/np = 10来约束。通过比较磁场和辐射所携带的功率与由低频射电辐射估算的喷流功率，我们发现在耀变体的耗散区有较高的磁化参数σ_（10）= 0.5，辐射效率η_（10）= 0.4。这些结果表明，磁场重联过程可能在耀变体的能量耗散中起着重要作用。我们还探讨了这三个参数（npairs/np，σ和η）与黑洞质量，盘光度和爱丁顿比之间的关系。没有发现显著的相关性，除了σ显示可能与盘光度相关。
The composition and energy dissipation in jets are two of the fundamental questions of jet physics that are not fully understood. In this paper, we attempt to constrain the composition, magnetization, and radiative efficiency for blazars with the recently released low-frequency radio catalog of the TIFR GMRT Sky Survey at 150 MHz. The jet power estimated from the low-frequency radio emission is much lower than that derived from spectral energy distribution fitting assuming one proton per electron. Assuming the jet power estimated from low-frequency radio emission is physical, the fraction of electron/positron pairs can be constrained with npairs/np ∼ 10. By comparing the power carried by the magnetic field and radiation with the jet power estimated from the low-frequency radio emission, we find both the relatively high magnetization parameter of σ ∼ 0.5 and the radiative efficiency of η ∼ 0.4 in the dissipation region of blazars. These results suggest that magnetic reconnection processes may play an important role in the energy dissipation of blazars. We also explore the connection between these three parameters (npairs/np, σ, and η) and the black hole mass, disk luminosity, and Eddington ratio. No significant correlation is found, except that σ shows a possible correlation with disk luminosity.
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影响因子：
4.8
作者：
M. Janiak;M. Sikora;R. Moderski
通讯作者：
M. Janiak;M. Sikora;R. Moderski
影响因子：
14.1
作者：
P. Padovani
通讯作者：
P. Padovani
DOI：
10.1111/j.1745-3933.2012.01280.x
发表时间：
2012-05
影响因子：
--
作者：
G. Ghisellini
通讯作者：
G. Ghisellini
影响因子：
4.8
作者：
Katarzyna Rusinek;M. Sikora;D. Kozieł-Wierzbowska;L. Godfrey
通讯作者：
Katarzyna Rusinek;M. Sikora;D. Kozieł-Wierzbowska;L. Godfrey
DOI：
10.1088/0004-637x/803/1/30
发表时间：
2015-02
期刊：
The Astrophysical Journal
影响因子：
--
作者：
M. Kino;Fumio Takahara;K. Hada;K. Akiyama;H. Nagai;B. Sohn
通讯作者：
M. Kino;Fumio Takahara;K. Hada;K. Akiyama;H. Nagai;B. Sohn