Galactic counter-rotation?

[Metryq]

In the most recent Space News, Dr. Scott previewed his coming talk for this year's EU conference. He mentioned counter-rotating bands of stars in galaxies. If there really is evidence for this, it would pretty well junk the idea of gravity-driven galaxies and all the dark matter nonsense that goes with it. Then again, establishment astronomers managed to ignore Halton Arp, too.

I've seen the computer models in every pop science documentary showing stars swirling around the galactic center in the same direction. (And the animations typically show the speed curve normal for planets in our Solar system.) We're also told that the stars bounce up and down through the galactic plane as they orbit. How was that determined? By redshift measurements? You see where this is going. Is this "bouncing" really counter-rotation seen through the filter of establishment astrophysics? Sometimes believing is seeing.

I cannot wait for August.

[Solar]

Well: There was something possibly related to this concept (I've not seen the video) but it has fallen off the radar. The Milky Way Halo was/is (?) thought to consist of regions having two different qualities which counter-rotated:

The halo, they have concluded, is composed of at least two distinct populations of stars, with different chemical makeups and different orbits. One group of stars, dubbed the inner halo, generally orbits closer to the galactic center, and its members tend to contain more heavy elements such as iron than do stars farther out. (Halo stars as a whole are depleted in these heavy elements, relative to stars in the galactic disk.) Stars of the outer halo occupy somewhat wider orbits around the galactic center, contain lower levels of heavy elements, and—unlike the inner halo—tend to follow retrograde orbits, circling the Milky Way in a direction counter to the rotation of the galactic disk. – Dual Interpretations: Milky Way's Outer Fringe of Stars Sparks Disagreement

The main galactic disk, home to our sun, rotates at an average speed of 500,000 mph. Surrounding the disk is what's now called the inner halo. It orbits in the same direction at about 50,000 mph. The outer halo, a sparsely populated region, spins in the opposite direction at roughly 100,000 mph.

There are chemical differences between the two parts … - Huge Newfound Part of Milky Way Rotates Backward

A simulation was made based to the observations:

Our results show that, for satellites more massive than ~1/40 of the main halo, the dynamical friction has a fundamental role in assembling the final velocity distributions resulting from different orbits and that retrograde satellites moving on low-inclination orbits deposit more stars in the outer halo regions and therefore can produce the counter-rotating behavior observed in the outer Milky Way halo. – ASSEMBLY OF THE OUTER GALACTIC STELLAR HALO IN THE HIERARCHICAL MODEL – G. Murante et al

But then some said ‘Yeah well; no.’

Their anomalous vertical motion hints at either a pipeline problem or a stream-like component rather than a smooth retrograde population. – Rotational signature of the Milky Way stellar halo F. Fermani et al

And then there was: Counter Rotation in Disks which has two outside links (“o-link” at the bottom) to related papers.

Lastly, along the lines of the E. Hubble “Tuning Fork” evolution of galaxies the “S0” type galaxies seem to be quite popular with exhibiting counter-rotating qualities so here is the Google Counter-Rotation Search for that kind of info.

Cheers

[nick c]

While the counter rotation issue is certainly interesting, I am intrigued by the diagram that depicts the galactic halos revolving around the galactic axis not the galactic core.

After all in a gravitational system should not the components be orbiting the super massive black hole which supposedly resides in the center of the core?