Op donderdag 3 maart 2016 08:46:37 UTC+1 schreef Robert L. Oldershaw:

http://arxiv.org/abs/1603.00464

Title: Did LIGO detect dark matter?


The interesting part about the article is that nowhere they mention
the words baryonic versus nonbaryonic. Instead what they use are the
concepts dark matter (7x) versus luminous matter (3x).
This are typical a human based concepts and IMO should not be used.
In a certain sense because we can not see BH's, by definition
we should call BH: dark-matter-hole's

The most important discovery with the Ligo experiment is the detection of
very small BH's in the order of 30 Sun masses.
The next question is what is the evolution path and what is their make up.

The most logical explanation is that they are normal stars which in some
way collapsed. That means they are baryonic.
Gas clouds which collapsed are a different option.
The next question how many of these BH's are there in an average galaxy.
If there are many, you can use them to explain the Galaxy Rotation curve
and you even do not need non-baryonic matter.
What makes this assumption, in this context, more acceptable is that these
pBH's easily can grow in size by merging with other small or large stars
(baryonic matter).

In the article they also mention the halo of a galaxy.
That means a galaxy consists of a bulge with radius r, a disc with a
radius "10r" (the disc is more or less flat) and an halo consisting
of everything outside the bulge and the disc with a radius of "10r".
In side that space you have the birthplace of these pBH's.

The question is what will happen with these pBH's?
IMO they will slowly travel towards the disc and the bulge.
That is IMO not so much of a problem when they are baryonic but
much more a problem when they are non-baryonic.

IMO to assume that pBH's are nonbaryonic creates more problems than
it solves except that if we assume that our sun is also for a large
part non-baryonic.

Nicolaas Vroom