弱等价原理在黑洞附近的检验
Testing the Weak Equivalence Principle near black holes
摘要：
今天，我们通过比较不同组成的试验体在地球引力场中的加速度，对可能违反弱等效原理的情况有相当严格的限制。本文提出在黑洞的强引力场检验弱等效原理。我们构造了一个相对论反射模型，在这个模型中，吸积盘中气体的大质量粒子或吸积盘发射的光子都可能不遵循时空的测地线。我们采用我们的模型来分析的NuSTAR光谱的黑洞二进制EXO 1846-031的反射功能，我们限制两个参数，量化可能违反弱等效原理的大质量粒子和X射线光子，分别。
英文摘要：
Today we have quite stringent constraints on possible violations of the Weak Equivalence Principle from the comparison of the acceleration of test-bodies of different composition in Earth's gravitational field. In the present paper, we propose a test of the Weak Equivalence Principle in the strong gravitational field of black holes. We construct a relativistic reflection model in which either the massive particles of the gas of the accretion disk or the photons emitted by the disk may not follow the geodesics of the spacetime. We employ our model to analyze the reflection features of a NuSTAR spectrum of the black hole binary EXO 1846-031 and we constrain two parameters that quantify a possible violation of the Weak Equivalence Principle by massive particles and X-ray photons, respectively.
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