Can the EHT M87 results be used to test general relativity?
Can the EHT M87 results be used to test general relativity?
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DOI：
10.1103/physrevd.103.024023
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发表时间：
2021-01-12
影响因子：
5
通讯作者：
Gralla, Samuel E.
中科院分区：
文献类型：
--
作者：
Gralla, Samuel E.
否。所有关于吸积超大质量黑洞观测外观的理论预测，都是由一个稀疏的地球大小的阵列在当前的观测频率下进行干涉测量的，对许多关于吸积流和发射物理的未经检验的假设很敏感。没有办法区分违反广义相对论和更有可能的情况，即相关的“胃物理”假设根本不成立。广义相对论的测试将有可能通过更长的干涉基线（可能需要一个太空任务）来达到分辨率，从而使该理论的独立于天体物理学的预测成为可观测的。
No. All theoretical predictions for the observational appearance of an accreting supermassive black hole, as measured interferometrically by a sparse Earth-sized array at current observation frequencies, are sensitive to many untested assumptions about accretion flow and emission physics. There is no way to distinguish a violation of general relativity from the much more likely scenario that the relevant "gastrophysical" assumptions simply do not hold. Tests of general relativity will become possible with longer interferometric baselines (likely requiring a space mission) that reach the resolution where astrophysics-independent predictions of the theory become observable.