Theory proposes that LIGO/Virgo black holes originate from a first order phase transition | 8/8/2019 | Staff
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Graphic showing the observed population of black holes of mass a few tens of solar masses. Credit: LIGO-Virgo/Frank Elavsky/Northwestern.

A few years ago, the LIGO/Virgo collaboration detected gravitational waves arising from a binary black hole merger using the two detectors of the Laser Interferometer Gravitational-Wave Observatory (LIGO). This eventually led to the observation of black holes with masses that are roughly 30 times the mass of the sun. Since then, researchers worldwide have been investigating these black holes, specifically examining whether they could be of primordial origin, meaning that they were produced in the early universe before stars and galaxies were formed.

Hooman - Davoudiasl - Physicist - Brookhaven - National

Hooman Davoudiasl, a theoretical physicist at the Brookhaven National Laboratory in New York, has recently introduced a new theory suggesting that the black holes observed by the LIGO/Virgo collaboration originate from a first order quark confinement phase transition. In his paper, published in Physical Review Letters, Davoudiasl implemented this idea using a light scalar that could turn out to be a good dark matter candidate.

Recent detections by the LIGO/Virgo collaboration suggest that there are several black holes that have similar masses (approximately 30 solar masses). This suggests that there might be a population of black holes that are characterized by a typical mass value.

Population - Evolution - Conditions - Origin - Explanation

"This population may be associated with stellar evolution and certain astrophysical conditions, but a primordial origin could also be a potential explanation," Hooman Davoudiasl, the researcher who carried out the study, told "This latter possibility is quite intriguing, but how such objects might form in the early universe is an open question."

A mechanism that could potentially lead to the production of primordial black holes (PBH) is an abrupt cosmological phase transition, which is somewhat similar to the transition from vapor to liquid that occurs when water condenses on a cold surface. An example of this phase...
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