New research suggests the early Universe hosted unusual compact objects. These include primordial black holes, boson stars and cannibal stars. Formation occurred within a second after the Big Bang event. The study sheds light on dark matter and early cosmic evolution.
What did the study find?
Researchers modelled an Early Matter-Dominated Era shortly after cosmic inflation. In this time, particles interacted and formed thick clouds of matter, or halos. Gravity made these halos collapse, which could have created small, heavy objects known as black holes. Some compact objects may also form exotic stars powered by annihilation.
What objects could exist?
Primordial black holes form when matter halos collapse under gravity. Boson stars are composed entirely of quantum bosonic particles instead. Cannibal stars survive by self-annihilation rather than standard nuclear fusion. Some primordial black holes could even contribute substantially to dark matter.
Who conducted the research?
Scientists at SISSA, along with some international colleagues, did a study that was published in Physical Review D. They used models and simulations to look at what the early Universe was like and see how tiny halos could have turned into small, dense objects in space.
Why does this matter?
The study gives us some ideas about what dark matter in the Universe could be. Some of the first black holes might have disappeared before the creation of the first elements. If we can figure out these early objects out, it might explain how cosmic structures formed. This creates fresh avenues to study unusual types of dark matter.
What comes next for scientists?
Future study may explore similar processes in modern dark matter. Observations of these compact objects might test theoretical predictions practically. Researchers aim to refine models of cannibal stars and boson stars. This study improves the understanding of early evolution of universe and particle physics.
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