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arXiv 2008.03879gr-qcastro-ph.HEhep-th
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黑洞光子环的形状:强场广义相对论的精确检验

The Shape of the Black Hole Photon Ring: A Precise Test of Strong-Field General Relativity

Samuel E. Gralla, Alexandru Lupsasca, Daniel P. Marrone

摘要:

基于黑洞光子环的普遍干涉特征,提出了强场广义相对论的一种新检验。光子环是一个狭窄的环形特征,由GR预测,但尚未观察到,出现在黑洞附近的图像上。它是由光在事件视界的几个史瓦西半径内的极端弯曲引起的,并提供了对克尔几何的不稳定束缚光子轨道的直接探测。我们发现,可观测光子环的精确形状是显着不敏感的天文源配置文件,因此可以被用来作为一个严格的测试GR。我们预测,量身定制的空间为基础的干涉测量实验针对M87* 可以测试克尔性质的源,以子-子-百分比的水平。

英文摘要:

We propose a new test of strong-field general relativity (GR) based on the universal interferometric signature of the black hole photon ring. The photon ring is a narrow ring-shaped feature, predicted by GR but not yet observed, that appears on images of sources near a black hole. It is caused by extreme bending of light within a few Schwarzschild radii of the event horizon and provides a direct probe of the unstable bound photon orbits of the Kerr geometry. We show that the precise shape of the observable photon ring is remarkably insensitive to the astronomical source profile and can therefore be used as a stringent test of GR. We forecast that a tailored space-based interferometry experiment targeting M87* could test the Kerr nature of the source to the sub-sub-percent level.

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。

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