What is dark matter made of? New study bolsters case for 'primordial' black holes

[Admin]

In the early universe, primordial black holes could acquire a "dark charge," giving them an unnaturally long lifetime, new research suggests. This makes them an interesting candidate for dark matter.

What is dark matter made of? New study bolsters case for 'primordial' black holes : Read more

 

[Unclear Engineer]

"This hypothesis is highly speculative" is putting it mildly!

In the comments on one of the previous Space.com articles about primordial black holes and dark matter, BillSlugg posted some dark matter density numbers that I compared to the density of regular matter in local interstellar space. His posted postulated dark matter density was much smaller than the measured regular matter density, leading me to ask if the dark matter, which is really just "missing" matter in the calculation of material that is needed to account for measured gravitational effects, could actually just be the result of slightly underestimating the density of regular matter.

As usual when I ask such questions here, there was no response.

There are two possibilities: (1) one of us has posted incorrect info about the density of either the dark matter or the density of regular matter in interstellar space, or (2) the density of dark matter in our vicinity of our galaxy is not 6 times the density of regular matter, as often stated,

So, how about some clarity? What is the density of dark matter hypothesized to be in the interstellar space in the vicinity of our solar system, and what is the measured density of regular matter in the same region (outside the heliopause)? Please cite sources so that I can check for incorrect unit conversions, etc.