Dark Matter not present in Galaxy when distance is Increased

[GiftOfPlasma]

TL;DR Summary

Dark Matter appears when distance is Reduced

I thought this article was interesting (and here).
It made me think, if a transformation is sufficient to eliminate or create Dark Matter... Then the mystery of the existence of Dark Matter would become a mystery of why all of the other distance measurements are wrong in a universe without Dark Matter.

Which way does Occam's razor slice?

 

[Vanadium 50]

Which way does Occam's razor slice?

Towards this thread being locked soon.

 

[kimbyd]

Summary: Dark Matter appears when distance is Reduced

I thought this article was interesting (and here).
It made me think, if a transformation is sufficient to eliminate or create Dark Matter... Then the mystery of the existence of Dark Matter would become a mystery of why all of the other distance measurements are wrong in a universe without Dark Matter.

Which way does Occam's razor slice?

I'm not sure what the confusion is here. The original observation overestimated the distance by around 50%. This caused them to think that the intrinsic brightness of the galaxy was far greater than it actually is. A brighter galaxy is brighter because it contains more mass in stars. They then were able to estimate how quickly the stars in the galaxy were orbiting, which showed that the mass in stars roughly matched the expected mass.

Now that multiple measurements have shown that the galaxy is actually much closer, its intrinsic brightness can't be nearly as high, so its mass in stars can't be anywhere near as high as originally thought, and so the remainder is made up by dark matter, and the galaxy no longer looks so bizarre.

This is usually the case with sensational results: if it sounds sensational, it's probably one of two things:
1) The result was exaggerated so that it's not as sensational as the news reporting makes it sound.
2) There's an error somewhere in the observation.

 

[PeterDonis]

if a transformation is sufficient to eliminate or create Dark Matter...

It's not a "transformation". It's a re-analysis of the data which shows that the distance to this particular galaxy was overestimated.

a mystery of why all of the other distance measurements are wrong

That's not a "mystery", it's just a highly implausible claim that is not a suitable basis for further discussion.

Thread closed.