A new paper published in Nature today (March 28th) provides convincing evidence that dark matter does exist there, and modifying the laws of physics itself cannot solve the problem of the weight of the universe. The biggest unsolved mystery of "KDSP" and "KDSP" is 18. Researchers have discovered an object with dark matter in the universe, but this is almost unimaginable in the Mond universe: a completely normal galaxy,
Our researchers first discovered the galaxy NGC 1052-DF2 through the long-range photographic array of dragonflies. Then, after long-term observation by Hubble telescope, Hawaiian Gemini telescope and W.M. Keck Observatory, the researchers found that the behavior of galaxies is exactly what our physical laws predict-no dark matter correction is needed. When calculated according to the mass of a star that researchers can see, it moves as fast as the traditional laws of astrophysics suggest. This "normal" is strange. "KDSPEE", "KDSPEE" and "KDSPEE" Dragonfly telephoto arrays are robot sky observers who enter space from New Mexico through several common Canon lenses. (University of Toronto and Yale University)
So NGC 1052-DF2 is a catch, whether you prefer dark matter or Mond. But most physicists who discussed this paper in contact with life sciences said that this discovery made dark matter (already the main explanation of the singularity of the universe) look more likely.
It's something about dark matter, or something that causes this strange movement in outer space, and its distribution in the universe is predictable. Physicists predict that dark matter "halo" is very large around bright and dark galaxies like NGC 1052-DF2, and they expect to find less evidence of dark matter effect in galaxies with greater mass. Similarly, Mond theorists expect to find the most significant observable effect of their modified law in lower-quality galaxies, such as NGC 1052-DF2, but it has less influence in larger galaxies. Kathryn Zurek, an astrophysicist at Lawrence Berkeley National Laboratory, wrote in an email to Life Sciences that this discovery "seems to be another nail in Mond's coffin on the surface" because "there is no DM[ dark matter] in this galaxy, which indicates that baryon [normal matter] and DM do exist as independent substances.
In other words, finding a galaxy without dark matter is good evidence of the existence of dark matter. If there is no dark matter, and the current laws of physics are only slightly wrong, you will think that the laws of NGC 1052-DF2 are as wrong as those of other places. [8 galaxies with strange names] "kdspe" and "kdsps", but this does not mean that the results of this paper provide perfect support for dark MA. Dan Bauer, a physicist at Fermi National Accelerator Laboratory, said that there is a cosmic simulation started by BIGBANG, which shows that dark matter is produced by gravity and actually attracted, which is why galaxies form. He studied dark matter, but didn't do any work on his paper.
At the beginning, those simulations showed that everything we saw in the Milky Way was diffused in thin gas. But dark matter floats in groups. Over time, the gravity of these blocks will attract gas. Gas squeaks in the sphere and lights up into stars, forming planets and galaxies. [Is the "lump" of dark matter less than predicted? ]
"Basically, it is the seed for drawing normal matter," Bauer told Life Science. So if you find that a galaxy seems to have no dark matter, you will definitely ask: "How did it form?" KD SPE "KD SPS", while NGC 1052-DF2 did not break any basic rules of dark matter theory. Bauer said that galaxies are surprising and unexpected enough to force astrophysicists to develop new models of how galaxies come together. An astrophysicist in case western reserve university, Ohio, studied dark matter and Mond, but he didn't work in this paper. He disagreed with the view that galaxies refute Mond or support dark matter.
"I found this (discovery) impossible under all possible circumstances," mccall wrote in an email, which is not wrong, but strange.
He wrote that if the behavior of NGC 1052-DF2 conforms to the description of the new study, then it challenges two explanations of mass loss in the universe. Of course, it is not easy for Mond to explain the behavior of a galaxy, as if there is no mass loss. But dark matter theorists rely heavily on the idea of "abundance matching", which closely relates the quality of dark matter halo to the quality of its surrounding galaxies. Kdspe kdsps This is my experience: when I find something meaningless in Mond, it usually doesn't make sense in dark matter. He wrote:
But from this perspective, mccall is a little different.
"I don't think this is convincing at all," Bauer said. For me, there are many ways to form such a galaxy-for example, in the collision of other galaxies. "kdspe" kdsps mcgoof also believes that scientists rely on too little data to completely determine their conclusions. The researchers calculated the spin speed of NGC 1052-DF2 by observing the motion of10 objects in the galaxy. He said that 10 objects are not always enough to accurately measure the motion of galaxies.
"I have no reason to doubt these data, although I noticed that only 65,438+00 objects contributed to [velocity] measurement," he wrote. And 10 celestial bodies are not always enough to accurately measure the motion of galaxies. "When more data is obtained, sometimes this (number) proves to be enough, but sometimes it proves to be insufficient. Therefore, this is a credible advantage.
He also proposed the possibility that another nearby galaxy could adjust the motion of NGC 1052-DF2 through a Mond element called "external field effect". However, he said he needed more accurate data to explain more.
Life Science contacted several other experts in the Milky Way and asked them what they thought about the rotation intensity, the measurement and statement in the paper, but they didn't get a response from the reporter.
Bauer's research focuses on dark matter, not galaxy rotation. He said that the most interesting next step for him would involve simulation. He said that he wanted to see if researchers studying the formation of galaxies could come up with some models to explain NGC 1052-DF2. Now, a piece of paper about galaxies is far from conclusive evidence of the existence of dark matter. But this is another fascinating clue about the mystery of the invisible universe published in Domain Science.