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Thakurta metric does not describe a cosmological black hole

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 نشر من قبل Tomohiro Harada
 تاريخ النشر 2021
  مجال البحث فيزياء
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Recently, the Thakurta metric has been adopted as a model of primordial black holes by several authors. 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 the null energy condition as a solution of the Einstein equation. Therefore, this metric does not describe a cosmological black hole in the early universe.



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