Polarization distribution in the image of a synchrotron emitting ring around regular black holes
Polarization distribution in the image of a synchrotron emitting ring around regular black holes
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发表时间：
2022
影响因子：
4
通讯作者：
Xueyao Liu;Songbai Chen;Jiliang Jing
中科院分区：
文献类型：
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作者：
Xueyao Liu;Songbai Chen;Jiliang Jing
我们分别研究了同步辐射环在常规海沃德黑洞和巴丁黑洞周围的偏振图像。它们每一个都携带一个磁场，以重力的形式与非线性电动力学耦合。我们的结果表明，在这两个规则黑洞时空中，发射环的偏振图像的主要特征是相似的。在Hayward黑洞和Bardeen黑洞时空中，随着磁荷参数的增大，成像平面上的极化强度和电矢量位角均增大。我们还研究了常规黑洞时空和史瓦西情况下的极化强度和电矢量位角的差异，表明海沃德黑洞时空的差异小于巴丁黑洞时空。我们还发现了磁荷参数对巴丁黑洞时空中略大的Q−U环冲程的影响。这些信息存储在海沃德和巴丁黑洞周围的偏振图像中，可以帮助我们理解规则黑洞和引力耦合的非线性电动力学。
We have studied the polarized image of a synchrotron emitting ring around regular Hayward black hole and Bardeen black hole, respectively. Each of them carries a magnetic field itself in terms of gravity coupled to a nonlinear electrodynamics. Our results show that the main features of the polarization images of emitting rings are similar in these two regular black hole spacetimes. With the increase of magnetic charge parameter, the polarization intensity and electric vector position angle in the image plane increase in both Hayward black hole and Bardeen black hole spacetimes. We also investigate the differences of polarization intensity and electric vector position angle between in the regular black hole spacetime and in the Schwarzschild case, which indicates that the differences in the Hayward black hole spacetime are smaller than those in the Bardeen black hole. We also find the effects of the magnetic charge parameter on the Strokes Q − U loops slightly larger in Bardeen black hole spacetime. These information stored in the polarization image around Hayward and Bardeen black holes could help us to understand regular black holes and the gravity coupled a nonlinear electrodynamics.