First test of rival to Einstein’s gravity kills off dark matter
newscientist.com
First test of rival to Einstein’s gravity kills off dark matter
1–10 of 87 posts
Re: First test of rival to Einstein’s gravity kills off dark matter
#2'Kills off dark matter" is probably overstating the case, but I love this theory because it ties together a lot of big ideas.
Verlinde's paper is here: https://arxiv.org/abs/1611.02269
Re: First test of rival to Einstein’s gravity kills off dark matter
#3You may find the top answer to this SE question helpful (asked 5 years ago, though): http://physics.stackexchange.com/questions/6561/are-modified.... Especially I think the following comment is spot on:
"Galaxy rotation curves are not very good tests for GR itself, since there are so many parameters about mass distribution in a galaxy which are simply not nearly as precisely understood as GR itself"
Re: First test of rival to Einstein’s gravity kills off dark matter
#4Good . Dark matter is bullshit. There's no proof cause there isn't any "dark matter". Whatever the hell that was supposed to mean anyway.
Re: First test of rival to Einstein’s gravity kills off dark matter
#5I'd be kind of bummed to lose dark matter as a concept. I want to hold onto the idea that it's just as rich as our matter, with its own quantum chromodynamics and an equivalent to the electromagnetic force, leading to a "shadow" universe with their own planets, life, etc. that exists side by side us, trying to figure out why their gravity measurements are just slightly off...
Re: First test of rival to Einstein’s gravity kills off dark matter
#6Juuuust gonna leave this here...
Re: First test of rival to Einstein’s gravity kills off dark matter
#7> Now, a team of astronomers studying the distribution of matter in more than 30,000 galaxies say their observations can be explained by an alternative theory that does away with dark matter. If this “modified gravity” is correct, it would up-end hundreds of years of fundamental physics.
No, it would reshape the "top" of these theories. The base would remain the same.
Re: First test of rival to Einstein’s gravity kills off dark matter
#8Juuuust gonna leave this here... http://xkcd.com/1758/
This is different because it's an experiment for this theory.
Re: First test of rival to Einstein’s gravity kills off dark matter
#9I'd be kind of bummed to lose dark matter as a concept. I want to hold onto the idea that it's just as rich as our matter, with its own quantum chromodynamics and an equivalent to the electromagnetic force, leading to a "shadow" universe with their own planets, life, etc. that exists side by side us, trying to figure out why their gravity measurements are just slightly off...
I wouldn't be so worried yet. Verlinde's theory is quite fresh and it will take time to conclusively rule out Standard Cosmological model. As of yet, no one has properly worked out entropic gravity equivalent of various gravitational effects that arise in General Relativity such as gravitational lensing, a part of which was used in the paper discussed in the article.
Never the less, Verlinde's ideas are more interesting and reasonable than other proposed modification of gravity, but that's just my opinion.
Re: First test of rival to Einstein’s gravity kills off dark matter
#10I'd be kind of bummed to lose dark matter as a concept. I want to hold onto the idea that it's just as rich as our matter, with its own quantum chromodynamics and an equivalent to the electromagnetic force, leading to a "shadow" universe with their own planets, life, etc. that exists side by side us, trying to figure out why their gravity measurements are just slightly off...
I had this thought as well. Time to start subscribing more heavily to a viable multiverse theory, at least to support my tastes in science fiction novels anyway.