Saturday , March 6 2021

So what's going on with this "hurricane of dark matter"?



It's a perfect science-fantasy device: a hurricane of dark matter. Recent research in real life has shown that our sun is currently covered in the so-called star stream.

Some publications took advantage of this worrying idea that it was reported that the Earth would be covered with a dark storm – but in fact, if it exists, we are already in a storm. The reality of the situation is not so terrible, but it is nevertheless interesting.

Star streams are populations of related stars that could once be pieces of a gallery or a deep cluster, but now they have been crushed by gravity forces and parts of our galaxy.

Because astronomers are quite convinced that things called dark matter serve as gravity scaffolds for dwarf galaxies, the star stream should also contain a few percent of the dark matter. Perhaps the experiment of dark matter could detect the particles of the dark matter from a recently discovered stream flowing through our cosmic neighborhood.

"There should be a current in which we are now," said Ciaran O'Hare, a postdoctoral researcher at the Department of Theoretical Physics at the University of Zaragoza. Gizmodo. "I immediately thought of the consequences for the dark matter."

The most successful models for the description of the universe are based on experiments that show that the cosmos consists of 4 percent of the regular substance, perhaps 70 percent of the "dark energy" that is universally the universe and the rest is about 25 percent, the "dark matter". Scientists have reason to believe that the dark matter consists of particles, the same as that everything that can be seen is made of particles, and that the stage for a great universe is the structure of the universe. But this dark matter has ever been observed on the basis of its gravitational effects.

Scientists are in the midst of hunting particles of dark matter. Meanwhile, surveys such as the Gaia telescope of the European Space Agency and the Sloan Digital Sky survey have created huge maps of the sky, along with positions, speeds and other data points for our region of the Milky Way galaxy. The data revealed "significant structures", such as this current and accompanying dark hurricane, called S1, which hit the solar system.

Perhaps this hurricane dark substance could be detected by today's existing experiments to detect dark matter and have a distinctive signal from the dark matter behind the Milky Way. The hurricane will be much faster – "hurricane" compared to the dark "wind", according to a report published last week Physical examination D. The researchers then analyzed whether they could observe the flow of incoming dark matter detectors.

If a dark matter is composed of a "weakly interactive solid particle" or a WIMP, a particle of a mass similar to another particle that interacts weakly (imagine a light breeze interacting with a skyscraper), then the hurricane would only be detected if the particles according to the newspaper had a specific mass.

Attempts such as the XENON NT detector in Italy would not be possible she chose Laura Baudis, a professor of physics at the University of Zurich, who was not included in the new document. This would mean a much larger detector, depending on the types of WIMPs that are already excluded.

And if the dark matter consists of much lighter particles, called axions, the effects of the hurricanes might be more noticeable than the paper's calculation.

"I think this is a rather interesting idea," said Sownak Bose, postdoctoral associate at the Harvard-Smithsonian Center for Astrophysics Gizmodo. "All those attempts to detect a dark substance have the potential to increase their signals with this additional flow."

Bose stressed that the amount of dark matter in streams may vary with the specific galaxy that generated the current, or if the dark matter is something more exotic than the theoretical WIMPs and axioms. But he was impressed by the incredible amount of Gaia data he could do to study these flows.

So if the dark matter is a hurricane, we are literally inside it right now. But we are safe (from the dark matter at least). This so-called storm is most interesting for its scientific potential. He said O'Hare: "We know so little about the dark matter that it helps us understand any better knowledge of its structure."

[PRD]

Source link