Is this/Can this be the "obvious"answer to the DM conundrum?

[beecee]

https://phys.org/news/2018-08-quest-source-black-hole-dark.html

Quest for source of black hole dark matter

August 14, 2018 by Anne M Stark, Lawrence Livermore National Laboratory

Like a game of "hide and seek," Lawrence Livermore astrophysicists know that there are black holes hiding in the Milky Way, just not where.

"If they find them toward the galactic bulge (a tightly packed group of stars) and the Magellanic Clouds, then black holes as massive as 10,000 times the mass of the sun might make up dark matter. If they are only toward the galactic bulge then they are probably just from a few dead stars."

Read more at: https://phys.org/news/2018-08-quest-source-black-hole-dark.html#jCp
extract:

"We are developing a novel means of microlensing detection that will enable us to detect the parallactic microlensing signature associated with black holes in this mass range," Dawson said. "We will detect and constrain the fraction of dark matter composed of intermediate mass black holes and measure their mass spectrum in the Milky Way."

Read more at: https://phys.org/news/2018-08-quest-source-black-hole-dark.html#jCp

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https://academic.oup.com/mnras/article-abstract/476/1/2/4797182?redirectedFrom=fulltext#

Primordial black holes as dark matter: constraints from compact ultra-faint dwarfs:

 

Abstract

The ground-breaking detections of gravitational waves from black hole mergers by LIGO have rekindled interest in primordial black holes (PBHs) and the possibility of dark matter being composed of PBHs. It has been suggested that PBHs of tens of solar masses could serve as dark matter candidates. Recent analytical studies demonstrated that compact ultra-faint dwarf galaxies can serve as a sensitive test for the PBH dark matter hypothesis, since stars in such a halo-dominated system would be heated by the more massive PBHs, their present-day distribution can provide strong constraints on PBH mass. In this study, we further explore this scenario with more detailed calculations, using a combination of dynamical simulations and Bayesian inference methods. The joint evolution of stars and PBH dark matter is followed with a Fokker–Planck code PHASEFLOW. We run a large suite of such simulations for different dark matter parameters, then use a Markov chain Monte Carlo approach to constrain the PBH properties with observations of ultra-faint galaxies. We find that two-body relaxation between the stars and PBH drives up the stellar core size, and increases the central stellar velocity dispersion. Using the observed half-light radius and velocity dispersion of stars in the compact ultra-faint dwarf galaxies as joint constraints, we infer that these dwarfs may have a cored dark matter halo with the central density in the range of 1–2 M⊙pc − 3, and that the PBHs may have a mass range of 2–14 M⊙ if they constitute all or a substantial fraction of the dark matter.

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I see this as interesting research which may lead to the probable answer to one of cosmology's most asked question. But my first thought/s, would be does it or can it, explain the "Bullet Cluster" observation?