Thakurta metric does not describe a cosmological black hole
Thakurta metric does not describe a cosmological black hole
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Thakurta 度量并没有描述宇宙黑洞
DOI：
10.1016/j.physletb.2022.137332
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发表时间：
2022
影响因子：
4.4
通讯作者：
Sato Takuma
中科院分区：
文献类型：
--
作者：
Harada Tomohiro;Maeda Hideki;Sato Takuma
最近，Thakurta度规被采用作为原始黑洞的模型。我们表明，这个度规所描述的时空既没有黑洞事件视界，也没有黑洞捕获视界，并涉及违反所有的标准能量条件作为爱因斯坦方程的解。因此，这个度规并没有描述早期宇宙中的宇宙学黑洞。有人指出，一个矛盾的要求，由另一组源于一个不正确的选择的标志。
Recently, the Thakurta metric has been adopted as a model of primordial black holes. We show that the spacetime described by this metric has neither black-hole event horizon nor black-hole trapping horizon and involves the violation of all the standard energy conditions as a solution of the Einstein equation. Therefore, this metric does not describe a cosmological black hole in the early universe. It is pointed out that a contradictory claim by the other group stems from an incorrect choice of sign.