I suspect astronomers are not familiar with ring currents.
Distant galaxy clusters with arcs or circles are never explained as an electrical phenomenon.
This should not be when even Jupiter is known to have a ring current:
'The total ring current in the [Jupiter] equatorial current sheet is estimated at 90–160 million amperes.'
Wikipedia has an image of the Jupiter magnetosphere showing the torus.
When ring currents are unknown to astronomers then these observed rings and arcs have no explanation - other than the incredible gravitational lens excuse that happens to be somewhere in the field of view to be assigned as the cause with no technical details (like the correct mass to create the observed angle for the circle or arc).
Hoag's Object might be the best known example of a ring of stars around a nucleus.
When zooming into an image (Wikipedia has one), another more distant Hoag's Object is seen at about 1 o'clock to the nucleus.
RXJ1131-1231 is another example of an object with rings. Wikipedia has an image combining light and X-ray.
The explanation of this image is absolutely incredible!
However, the measurements would not have been possible without a rare alignment of the quasar and a giant elliptical galaxy (which is itself part of a cluster of other galaxies in line with the quasar) which lies between Earth and RX J1131-1231. This line-up provided a quadruple gravitational lens which magnified the light coming from the quasar. The strong gravitational lensing effect associated with RX J1131-1231 has also produced measured time delays; that is, in one image the lensed quasar will be observed before the other image.
This image of a ring around the nucleus is rather similar to Hoag's Object so that should have been a possible explanation. Instead this image is claimed to be an illusion, the result of 4 simultaneous lenses. Wow!
Abell 2261 has a well known partial arc to the left, at about 9 o'clock to the giant elliptical. This arc does not have a uniform intensity, slightly dimmer in the middle.
Abell 383 has a well known partial arc to the right, from about 3 to 6 o'clock to the giant elliptical. The bottom end of this arc has a slighter brighter object.
When zooming into this image, outside this arc and slightly below it is another object, an elliptical with a ring around it but disturbed as not a true circle.
There is a slight arc at about 8 o'clock to the nucleus but this arc terminates with a brighter object at the bottom end.
Arcs that terminate with a bright object require quite a coincidence for a lens.
Abell S1063 has several partial arcs to the left of a huge elliptical galaxy.
Abell 1413 has a partial arc at about 11 o'clock to the giant elliptical.
It has this explanation:
Visible distortions in the image can be seen in the form of arcs, caused by gravitational lensing.
Abell 611 has an arc associated with a large central object. This arc extends from about 8 o'clock to about 12 o'clock.
These interesting electrical effects are just dismissed as a distortion. Rather than an ignored mirage they should be appreciated as observed.
It is unfortunate that images are not available for all identified galaxy clusters.
Instead of collecting many images (including those mentioned above) into multiple facebook posts they are in one separate web page.
I find these images very interesting; perhaps others will also. You just have to click once to get there. The page with this link has links both to the descriptions and to just the images. The images are zoomable to reveal more than I mention if someone is curious.
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Here is the list of topics in this Cosmology Topic Group .
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