Planck “Star” to Arise From Black Holes?

A new paper has been posted on the arxiv (a repository of research preprints) introducing the idea of a Planck star arising from a black hole. These hypothetical objects wouldn’t be a star in the traditional sense, but rather the light emitted when a black hole dies at the hands of Hawking radiation. The paper hasn’t been peer reviewed, but it presents an interesting idea and a possible observational test.

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> wouldn’t be a star in the traditional sense, but rather the light emitted when a black hole dies at the hands of Hawking radiation.

That has previously been described to me as a “brief burst of gamma radiation”.

mollwollfumble said:

> wouldn’t be a star in the traditional sense, but rather the light emitted when a black hole dies at the hands of Hawking radiation.

That has previously been described to me as a “brief burst of gamma radiation”.

Well, it’d start as ultra-low frequency BB radiation, and quickly work its way up the spectrum. Of course, under standard models of black hole behaviour, the universe is far too young for stellar (or larger) black holes to lose mass through Hawking radiation., and they certainly haven’t had time to fully evaporate yet.

I guess it might be possible for primordial black holes to have evaporated already, but apart from mysterious gamma ray bursts there’s not much evidence for primordial BHs, and the mysterious gamma ray bursts could be the result of more mundane events.

ok, a question, could particles tunnel out of a BH?