The nature of the dark matter component, presumably, about 80 percent of the mass of all particles of the Universe still remains a mystery to scientists. The lack of experimental evidence for the existence of particular particles proposed by theorists to the role of dark matter particles, as well as the recent discovery using Observatory LIGO gravitational wave coming, presumably, from two merging black holes (mass of about 30 solar masses), has revived interest in the hypothesis that dark matter may exist in the form of primary black holes, the mass of which range from 10 to 1000 solar masses.
Primary black holes, which could be formed as a result of fluctuations of matter with high density in the first moments of the Universe, are, generally speaking, of great scientific interest. Unlike black holes stellar mass, dimensions and weights which are limited by size and mass of the original parent stars, obeying the General laws of formation and evolution of stars, primordial black holes can have a wide range of possible masses and dimensions. They can be in the halo of the galaxy, and the occasional clash between the two primary black holes could lead to the formation of gravitational waves, was using the LIGO Observatory.
To test the hypothesis of the existence of primary black holes in the new study, researchers led by Mediavilla Evencio Gradolf (Evencio Mediavilla Gradolph) from the University of La Laguna, Spain the assumption of the existence of the gravitational microlensing of light coming from distant quasars, caused by the presence in the path of this light primary black holes, had calculated the intensity of such a hypothetical effect and compared the calculated brightness hypothetically lysed quasars (pictured) with their brightness according to the observation data. The comparison showed that the intensity of the anticipated effect of gravitational microlensing is quite low and can be explained by objects, mass of which ranges from 0.05 to 0.45 of the mass of the Sun. These masses comparable to the masses of the stars studied in the galaxy, from which the authors conclude that, most likely, the observed effect should be attributed to stars and black holes stellar mass, but not at the expense of primary black holes.