Comments on: Dark Matter Is Still Not Axions

By: Brandon Bell

Brandon Bell — Fri, 24 Jun 2016 04:32:30 +0000

No. We actually know quite a bit about dark matter. We don’t know what its constituents are, but its existence has been all but completely verified using several independent methods. For example, an experiment was done in either 2004 or 2006 (can’t remember exactly) that observed two merging galaxy clusters. A phenomenon regarding galaxy clusters is that they contain a hot plasma within them, so when they collide, the plasma clouds collide as if they are two solid objects colliding within a fluid. At the same time though, the galaxies themselves do not collide with one another due to their vast separation distances. Using gravitational lensing effects, physicists were able to map the contour lines of where the gravity was the strongest. If dark matter did not exist, the contours would have centered themselves on the plasma clouds as that is where the majority of the mass would be found. However, since dark matter does exist, the contour lines centered outside of the plasma clouds near the galaxies. which is exactly what one would expect.

By: istvanasz

istvanasz — Thu, 05 May 2016 02:54:31 +0000

Not sure how familiar you are with axion dark matter. The authors in the paper report on axion-like-particles – those having masses three or more orders of magnitude lower mass than axions that would play a meaningful role in dark matter cosmology.

The only experiment in the world sensitive to a dark matter axion is ADMX http://depts.washington.edu/admx/index.shtml which is still exploring viable parameter space.

By: Merlin

Merlin — Tue, 26 Apr 2016 19:31:25 +0000

Postulation think objectively dark matter is now in two forms inside cmb outside cmb due to reaction of big bang / dirac sea event. inside cmb it has a different charge sequence change than outside cmb we are expanding into therefore there is two types of dark matter in different interacting phases = why thy struggle to grasp the complex nature of it ie there or two totally different phase interactions at the micro .micro level but one type has a larger charge and charge Interaction in a nut shell

By: Brian Koberlein

Brian Koberlein — Tue, 26 Apr 2016 17:37:25 +0000

While the evidence is indirect, there is a confluence of evidence from a variety of experiments that support dark matter. It is similar to the indirect evidence we had of gravitational waves until their direct detection.

By: Terry L Rankin

Terry L Rankin — Tue, 26 Apr 2016 15:56:57 +0000

“We have lots of evidence to support (dark matter’s) existence ….” Really? Isn’t that evidence indirect at best, and doesn’t it really just amount to its theoretical value for explaining other data and evidence we *CAN* directly detect but is anomalous under relativity and quantum theories? And isn’t the same true of ‘dark energy’?