论文标题
强烈的重力镜头和来自M87*的阴影约束，缓慢旋转Kerr样黑洞
Strong gravitational lensing and shadow constraint from M87* of slowly rotating Kerr-like black hole
论文作者
论文摘要
Motivated by (i) more and more interest in strong gravitational lensing by supermassive black holes due to the achievement of EHT observations, (ii) the ongoing popular topic on the possibility of Lorentz symmetry being broken in gravitation and its consequences, we will apply the Einstein bumblebee gravity with Lorentz violation (LV) to the study of strong gravitational lensing effect and the black hole shadow of slowly rotating像克尔一样的黑洞。在强烈的引力镜头领域，我们首先计算偏转天使。然后将缓慢旋转的Kerr样黑洞视为超大质量M87*黑洞，我们评估了重力透镜观测值（位置，分离和放大倍数）以及相对论图像之间的时间延迟。在黑洞阴影扇区中，我们使用输入的球形积聚显示了LV参数对黑洞阴影和光子球的光度的影响。此外，我们探讨了各种阴影可观察到对LV参数的依赖性，然后通过EHT观测值的M87*黑洞对LV参数产生可能的约束。我们发现LV参数对强力透镜效应，黑洞阴影和光子球的光泽度具有显着影响。我们的结果指出，EHT观察的后代可能有助于区分Einstein Bumblebee的重力与GR，并可能对LV参数产生约束。
Motivated by (i) more and more interest in strong gravitational lensing by supermassive black holes due to the achievement of EHT observations, (ii) the ongoing popular topic on the possibility of Lorentz symmetry being broken in gravitation and its consequences, we will apply the Einstein bumblebee gravity with Lorentz violation (LV) to the study of strong gravitational lensing effect and the black hole shadow of slowly rotating Kerr-like black hole. In the strong gravitational lensing sector, we first calculate the deflection angel; then treating the slowly rotating Kerr-like black hole as supermassive M87* black hole, we evaluate the gravitational lensing observables (position, separation and magnification) and the time delays between the relativistic images. In the black hole shadow sector, we show the effect of LV parameter on the luminosity of the black hole shadow and photon sphere using the infalling spherical accretion. Moreover, we explore the dependence of various shadow observables on the LV parameter, and then give the possible constraint on the LV parameter by M87* black hole of EHT observations. We find that the LV parameter show significant effect on the strong gravitational lensing effect, the black hole shadow and photon sphere luminosity by accretion material. Our results point out that the future generations of EHT observation may help to distinguish the Einstein bumblebee gravity from GR, and also give a possible constrain on the LV parameter.
