用天鹅座X-1中的黑洞候选者检验巴氏度规
Testing the Bardeen metric with the black hole candidate in Cygnus X-1
摘要：
一般来说，要测试天体物理学上候选的黑洞的克尔性质是非常困难的，因为不可能同时独立测量自旋参数$a_*$和克尔解的可能偏差。非克尔物体可能看起来确实像克尔黑洞，但自旋不同。然而，模拟极端克尔黑洞要困难得多。天鹅座X-1中的候选黑洞具有近极值Kerr黑洞的特征，是检验Kerr黑洞范式的一个很好的对象。文献中报道的在Kerr时空中有效的3个$σ$ -界$a_* > 0.95$和$a_* > 0.983$分别变为$a_* > 0.78$和$|g/M| < 0.41$，以及在Barthummetric中的$a_* > 0.89$和$|g/M| < 0.28$，其中$g$是黑洞的Barthummetric电荷.
英文摘要：
In general, it is very difficult to test the Kerr-nature of an astrophysical black hole candidate, because it is not possible to have independent measurements of both the spin parameter $a_*$ and possible deviations from the Kerr solution. Non-Kerr objects may indeed look like Kerr black holes with different spin. However, it is much more difficult to mimic an extremal Kerr black hole. The black hole candidate in Cygnus X-1 has the features of a near extremal Kerr black hole, and it is therefore a good object to test the Kerr black hole paradigm. The 3$σ$-bounds $a_* > 0.95$ and $a_* > 0.983$ reported in the literature and valid in the Kerr spacetime become, respectively, $a_* > 0.78$ and $|g/M| < 0.41$, and $a_* > 0.89$ and $|g/M| < 0.28$ in the Bardeen metric, where $g$ is the Bardeen charge of the black hole.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
