A new outside the box proposal suggests small primordial black holes would hollow out asteroids or leave tunnels in rocks.
Are Primordial Black Holes real? They could’ve formed in the unusual physics that dominated the Universe shortly after the Big Bang. The idea dates back to the 1960s, but so far, the lack of evidence makes them purely hypothetical.
The authors claim that evidence for PBHs could be found in objects as large as hollowed out planetoids or asteroids and objects as small as rocks here on Earth. “We have to think outside of the box because what has been done to find primordial black holes previously hasn’t worked.”“If the object has a liquid central core, then a captured PBH can absorb the liquid core, whose density is higher than the density of the outer solid layer,” Stojkovic said.
“If the object’s density is too low for its size, that’s a good indication it’s hollow,” Stojkovic said. Studying an object’s orbit with a telescope is enough to reveal hollowness. PBHs could also leave microscopic tunnels in rocks and other objects on Earth. “The same effect could allow detection of a PBH here on Earth if we look for sudden appearance of narrow tunnels in metal slabs,” the authors write.
“The chances of finding these signatures are small, but searching for them would not require much resources and the potential payoff, the first evidence of a primordial black hole, would be immense,” said Stojkovic. “We have to think outside of the box because what has been done to find primordial black holes previously hasn’t worked.”
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