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Galaxy Rotation Negates Dark Matter --"If There's a Single Observation That We Might Have Something Essentially Wrong, This is It"

 

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"The standard model of cosmology is remarkably successful at explaining just about everything we observe in the universe," said Arthur Kosowsky, professor of physics and astronomy at the University of Pittsburgh, was not involved but reviewed the research."But if there is a single observation which keeps me awake at night worrying that we might have something essentially wrong, this is it."

In a new study a team of American astronomers found a striking correlation between the baryronic, visible matter (stars, planets, galaxies) and its rotation speed, which means they can predict the rotation of galaxies – without invoking the existence of dark. According to the standard model of cosmology, the immense gravity of dark matter is crucial for explaining why galaxies can spin so fast without tearing themselves apart. The discovery may alter the understanding of dark matter and the internal dynamics of galaxies.

In the late 1970s, astronomers Vera Rubin and Albert Bosma independently found that spiral galaxies rotate at a nearly constant speed: the velocity of stars and gas inside a galaxy does not decrease with radius, as one would expect from Newton's laws and the distribution of visible matter, but remains approximately constant. Such 'flat rotation curves' are generally attributed to invisible, dark matter surrounding galaxies and providing additional gravitational attraction.

Now a team led by Case Western Reserve University researchers has found a significant new relationship in spiral and irregular galaxies: the acceleration observed in rotation curves tightly correlates with the gravitational acceleration expected from the visible mass only.

"If you measure the distribution of star light, you know the rotation curve, and vice versa," said Stacy McGaugh, chair of the Department of Astronomy at Case Western Reserve and lead author of the research.

The finding is consistent among 153 spiral and irregular galaxies, ranging from giant to dwarf, those with massive central bulges or none at all. It is also consistent among those galaxies composed of mostly stars or mostly gas.

In a paper accepted for publication by the journal Physical Review Letters and posted on the preprint website arXiv, McGaugh and co-authors Federico Lelli, an astronomy postdoctoral scholar at Case Western Reserve, and James M. Schombert, astronomy professor at the University of Oregon, argue that the relation they've found is tantamount to a new natural law.

An astrophysicist who reviewed the study said the findings may lead to a new understanding of internal dynamics of galaxies.

"Galaxy rotation curves have traditionally been explained via an ad hoc hypothesis: that galaxies are surrounded by dark matter," said David Merritt, professor of physics and astronomy at the Rochester Institute of Technology, who was not involved in the research. "The relation discovered by McGaugh et al. is a serious, and possibly fatal, challenge to this hypothesis, since it shows that rotation curves are precisely determined by the distribution of the normal matter alone. Nothing in the standard cosmological model predicts this, and it is almost impossible to imagine how that model could be modified to explain it, without discarding the dark matter hypothesis completely."

McGaugh and Schombert have been working on this research for a decade and with Lelli the last three years. Near-infrared images collected by NASA's Spitzer Space Telescope during the last five years allowed them to establish the relation and that it persists for all 153 galaxies.

The key is that near-infrared light emitted by stars is far more reliable than optical-light for converting light to mass, Lelli said.

The researchers plotted the radial acceleration observed in rotation curves published by a host of astronomers over the last 30 years against the acceleration predicted from the observed distribution of ordinary matter now in the Spitzer Photometry & Accurate Rotation Curves database McGaugh's team created. The two measurements showed a single, extremely tight correlation, even when dark matter is supposed to dominate the gravity.

"There is no intrinsic scatter, which is how far the data differ on average from the mean when plotted on a graph," McGaugh said. "What little scatter is found is consistent with stellar mass-to-light ratios that vary a little from galaxy to galaxy."

Lelli compared the relation to a long-used natural law. "It's like Kepler's third law for the solar system: if you measure the distance of each planet from the sun, you get the orbital period, or vice versa" he said. "Here we have something similar for galaxies, with about 3,000 data points."

"In our case, we find a relation between what you see in normal matter in galaxies and what you get in their gravity," McGaugh said. "This is important because it is telling us something fundamental about how galaxies work."

Kosowsky said McGaugh and collaborators have steadily refined the spiral galaxy scaling relation for years and called this latest work a significant advance, reducing uncertainty in the mass in normal matter by exploiting infrared observations.

"The result is a scaling relation in the data with no adjustable parameters," Kosowky said. "Throughout the history of physics, unexplained regularities in data have often pointed the way towards new discoveries."

McGaugh and his team are not pressing any theoretical interpretation of their empirical relation at this point.

"The natural inference is that this law stems from a universal force such as a modification of gravity like MOND, the hypothesis of Modified Newtonian Dynamics proposed by Israeli physicist Moti Milgrom. But it could also be something in the nature of dark matter like the superfluid dark matter proposed by Justin Khoury," McGaugh said. "Most importantly, whatever theory you want to build has to reproduce this."

In the image at the top of the page X-rays and visible light eminate from the radio galaxy 3C31, located 240 million light-years from Earth. Calculating how fast such galaxies spin doesn't need to take dark matter into account, according to a new paper. (NASA / CXC / UNIV. OF BRISTOL / M. HARDCASTLE ET AL; OPTICAL: NASA / STSC)

The Daily Galaxy via Case Western Reserve University

Comments

Superfluid dark matter fills 'empty' space, strongly interacts with and is displaced by matter.

The Milky Way's dark matter halo appears to be lopsided
http://arxiv.org/abs/0903.3802

"the emerging picture of the dark matter halo of the Milky Way is dominantly lopsided in nature."

The Milky Way's halo is not a clump of dark matter traveling along with the Milky Way. The Milky Way's halo is lopsided due to the matter in the Milky Way moving through and displacing the superfluid dark matter, analogous to a submarine moving through and displacing the water.

What ripples when galaxy clusters collide is what waves in a double slit experiment, the superfluid dark matter which fills 'empty' space.

Superfluid dark matter displaced by matter relates general relativity and quantum mechanics.

At long last we can get past this 'ghost' which has been distracting from research into real physics.
Dark Matter is dead, get over it.

@mpc755. Fully agree with your comment, except the last paragraph that I think it's special relativity and not general relativity.

This is of course exactly what applying quantum theory to ordinary low-mass particles in deep gravity wells predicts. Treating traditional particles as localized Gaussian wavefunctions, and using quantum theory to calculate their interaction behavior, conclusively demonstrates that photon scattering cross sections of particles in galaxy-sized wells must be less than what we measure in labs. Baryons hidden in dark quantum 'disguises' not only explain this observation but also enable a greater universal fraction of baryons to be consistent with CMB anisotropy calculations and BBN. Please see J. Phys. A: Math. Theor. 42 (2009) 115207 and 115208. Dark matter particles can be essentially any stable elementary particles with dark-state biased eigenspectral ensembles, an effect that can be shown to happen to a halo's particles as it evolves in time.

Superfluid dark matter strongly interacts with matter?? I don't think so. By definition, dark matter does NOT "strongly interact" with matter. But I'm just carping about an extraordinarily poor choice of words in a term. "Conclusively demonstrates"? Again, I don't think so, but then again "conclusive evidence" is proof and proof is evidence sufficient to convince, in other words, it is subjective. This paper is, possibly, the canary in the coal mine. It is evidence (but hardly conclusive with only ~160 galaxies surveyed) that Dark Matter may be unnecessary to explain galactic rotation profiles. Given the parsimony principle, that you don't add unnecessary assumptions to a theory, then this shakes the foundations of Dark Matter and hence the Standard Model. Cool beans!

I did my MA Thesis on physical and religious cosmologies, inserting all the bullshit related to dark matter when I spoke about the former because, mathematically obvious!, Big Bang cosmology, Multiverse cosmologies and any other decent believable cosmology have to assume existence of dark matter. And know the same lens tell us that maybe dark matter doesnt exist! Thank you that you made me look like a fool. Anyway, the most of the readers dont know about what they are really speaking, they just took as granted all the cosmological parameters and so on. Lets define them before removing dark matter
Is fool who reads this papers from the first place!

Who is "Lelli"?
In your 11th paragraph, you quote someone named Lelli. But there is no mention of Lelli in your paragraphs above.
I find this occurring frequently in your stories. Sloppy!

Christian,
If you did a Thesis that contained something about dark matter I hope you failed, mathematically dark matter has no reason to exist. There is no missing matter. The dark matter hoax is as stupid as a god hoax. If anyone remembers my posts from the past knows that I have always known that dark matter was the dumbest freakin idea that has ever been created.

Cameron Brendiar,
I guess you missed this entire paragraph

In a paper accepted for publication by the journal Physical Review Letters and posted on the preprint website arXiv, McGaugh and co-authors Federico Lelli, an astronomy postdoctoral scholar at Case Western Reserve.....................

Sloppy! and very poor form cameron.

mpc755 ,
Do you even believe the crap you are spewing?

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