论文标题
用黑洞X射线数据探测大黄蜂重力
Probing bumblebee gravity with black hole X-ray data
论文作者
论文摘要
大黄蜂重力是最简单的重力理论之一，自发的洛伦兹对称性破裂。由于我们知道Bumblebee重力中的旋转黑洞溶液，因此我们可以通过可用的黑洞的天体物理观测来测试该模型。在这项工作中，我们在Bumblebee Gravity中构建了一个反射模型，并使用模型分析了银河黑洞EXO 1846-031的Nustar频谱的反射特征，以限制Lorentz-Violation参数$ \ ell $。我们发现，EXO 1846-031频谱中反射特征的分析无法限制参数$ \ ell $，因为$ \ ell $的估计值和黑洞旋转参数$ a _*$之间的估计值非常强。通过结合其他观察结果，这种退化性可能会破坏。
Bumblebee gravity is one of the simplest gravity theories with spontaneous Lorentz symmetry breaking. Since we know a rotating black hole solution in bumblebee gravity, we can potentially test this model with the available astrophysical observations of black holes. In this work, we construct a reflection model in bumblebee gravity and we use our model to analyze the reflection features of a NuSTAR spectrum of the Galactic black hole EXO 1846-031 in order to constrain the Lorentz-violating parameter $\ell$. We find that the analysis of the reflection features in the spectrum of EXO 1846-031 cannot constrain the parameter $\ell$ because of a very strong degeneracy between the estimates of $\ell$ and of the black hole spin parameter $a_*$. Such a degeneracy may be broken by combining other observations.
