Year: 2022
Type: article
Abstract: A primordial black hole (PBH) is thought to be made of the regular matter or ordinary mass ($M$) only, and hence could have already been decayed due to the Hawking radiation if its initial ordinary mass were $\ensuremath{\lesssim}5\ifmmode\times\else\texttimes\fi{}{10}^{11}\text{ }\text{ }\mathrm{kg}$. Here, we study the role of a gravitomagnetic monopole for the evaporation of PBHs, and propose that the lower-energy PBHs (equivalent to ordinary mass $M\ensuremath{\ll}5\ifmmode\times\else\texttimes\fi{}{10}^{11}\text{ }\text{ }\mathrm{kg}$) could still exist in our present Universe, if it has a gravitomagnetic monopole. If a PBH was initially made of both regular matter and a gravitomagnetic monopole, the regular matter could decay away due to the Hawking radiation. The remnant gravitomagnetic monopole might not entirely decay, which could still be found as a PBH in the form of the `pseudomass-energy'. If a PBH with $M\ensuremath{\gtrsim}5\ifmmode\times\else\texttimes\fi{}{10}^{11}\text{ }\text{ }\mathrm{kg}$ is detected, one may not be able to conclude if it has gravitomagnetic monopole, but, a plausible detection of a relatively low-energy (equivalent to $2.176\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}8}\text{ }\text{ }\mathrm{kg}
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4309681099