"The Subaru Telescope and Hyper Suprime-Cam have already helped researchers create a 3D map of dark matter, and observation of primordial black holes
, but now this result proves that this instrument has a very high capability finding supernovae very, very far away from Earth.
By looking at fluctuations in the light from Icarus, as it moved through the galaxy cluster, the researchers concluded dark matter was unlikely to be made up of primordial black holes
that spawned at the time the universe was born in the Big Bang.
Medium-sized black holes range from tens to hundreds of thousands of solar masses and are thought to form in the early universe as supernova remnants or as descendants of primordial black holes
."The presence of IMBHs in the centres of galaxies isn't something many people talk about these days, even though they've been predicted," says Jillian Bellovary at the American Museum of Natural History."We haven't thought a lot about how dark matter might accumulate in clumps (aka density spikes) near IMBHs." Astronomers struggled to find evidence for these holes until the Laser Interferometer Gravitational-Wave Observatory (LIGO) first detected a merging pair in September 2015.
As a scientist, Hawking dived into the two most fascinating fields of astrophysics -- the origin of the universe, and black holes; sometimes he even combined the two, as when he inferred the existence of primordial black holes
from the early times of the universe, tiny objects that would evaporate and ultimately release huge amounts of energy.
Unlike run-of-the-mill black holes that form from collapsing stars, primordial black holes
could have formed when dense regions of the early universe collapsed under their own gravity, some theories suggest.
Occasionally, some primordial black holes
will pass close enough to be gravitationally captured into binary systems.
Nozari, "A possible mechanism for production of primordial black holes
in early universe," Astroparticle Physics, vol.
In Sections 6 and 7 we report the discovery of exact black hole solutions embedded in an expanding universe, and discuss the nature of their evolution over time, suggesting that primordial black holes
develop linking filaments, which in turn form a cosmic network with bubble structures.
Primordial black holes
, in fact, produced in their trillions at the time of the Big Bang and left evaporating through so-called 'Hawking radiation' ever since.
Theoretical remnants of the Big Bang, primordial black holes
possess the properties of dark matter and are one of various cosmic objects thought to be the source of the mysterious substance, but they have yet to be observed.
Some areas explored include formation and evolution of primordial black holes
, turbulent formation of protogalaxies at the end of the plasma epoch, and tracking order and chaos in a binary quasar dynamical model.