论文标题
贝丁黑洞周围的测试颗粒的动力学，周围是完美的液体暗物质
Dynamics of test particles around a Bardeen black hole surrounded by perfect fluid dark matter
论文作者
论文摘要
我们研究（i）中性测试颗粒，（ii）磁性测试颗粒的动力学，（iii）测试磁偶极子周围的常规Bardeen黑洞，周围是完美的流体暗物质（PFDM）。已经显示了黑洞的磁电荷和周围PFDM的参数如何影响测试粒子的最内向稳定的圆形轨道（ISCO）半径。我们发现，由于磁电荷参数和完美的流体暗物质的综合效应，ISCO半径受到强烈影响。黑洞磁性电荷参数$ g $和完美的液体暗物质的综合效果可以模仿黑洞旋转参数，最高为$ a/m \约0.9 $。已经观察到，用于磁性偶极子的ISCO在超过磁相互作用参数$β$的高值的值下消失。上限随着暗物质和磁电荷参数的增加而降低。最后，作为一种天体物理的应用，我们分析了Kerr黑洞自旋的退化效应和常规Bardeen黑洞的磁性电荷，用于暗物质参数的不同值，为磁性偶极子的ISCO radius的值完全相同，具有相同的磁盘值= 10.2 $的磁孔，称为PSR J1745-2945-2900或BORKIAST ARY SAD SAD AR*= 10.2 $。
We study the dynamics of (i) neutral test particles, (ii) magnetically charged test particles, and (iii) test magnetic dipole around a regular Bardeen black hole surrounded by perfect fluid dark matter (PFDM). It has been shown how the magnetic charge of the black hole and the parameter of the surrounding PFDM can influence the innermost stable circular orbit (ISCO) radius of a test particle. We have found that the ISCO radius is strongly affected as a consequence of the combined effect of the magnetic charge parameter and the perfect fluid dark matter. The black hole magnetic charge parameter $g$ and the combined effect of perfect fluid dark matter can mimic the black hole rotation parameter up to $a/M\approx 0.9$. It has been observed that the ISCO for magnetic dipole disappears at the values exceeding the calculated upper value for the magnetic interaction parameter $β$. The upper limit decreases with the increase of both the dark matter and magnetic charge parameters. Finally, as an astrophysical application, we have analyzed degeneracy effects of spin of Kerr black holes and magnetic charge of regular Bardeen black holes for the different values of the dark matter parameter providing exactly the same value for ISCO radius of a magnetic dipole with the same value of the parameter $β=10.2$ of the magnetar called PSR J1745-2900 orbiting around supermassive black hole Sagittarius A*.
