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Scientists have discovered a new type of stellar explosion

A team of astronomers using a very large Southern European Observatory (VLT) telescope has observed a new type of stellar explosion: A micronova or microwave.

Microwave eruptions occur on the surface of some stars, each of which can burn about 3.5 billion times the mass of stellar material in just a few hours in the Great Pyramid of Giza in Egypt.

"We have discovered and identified for the first time what we call a 'micronova' (Micronova)," explained Simone Scaringi, an astronomer at Durham University in the United Kingdom, in an article published in the journal Nature. This phenomenon challenges our understanding of how thermonuclear explosions occur in stars. "We used to think we knew the subject well, but this discovery suggests a whole new way to achieve them."
  • By identifying the dance Death between two stars, a new possible type of supernova was discovered

Microns are indeed very powerful events, but they are small on an astronomical scale. The intensity of these explosions is much lower than that of the famous star Novae and the larger supernova explosions that astronomers have known for centuries. Both types of explosions occur in white dwarfs, the dead stars with the mass of our sun but as small as Earth.

If a white dwarf is close enough to its companion in a two-star system, it can cause , Mainly draws hydrogen from its companion star. As the gas falls on the very hot surface of the white dwarf star, it stimulates hydrogen atoms to explode into helium.

In neoparticles, these thermonuclear explosions occur throughout the star's surface. Nathalie Degenaar, an astronomer at the University of Amsterdam in the Netherlands and one of the authors of the article, noted: "Such explosions cause the entire surface of the white dwarf to burn and glow for weeks." /2204/19237-2.jpg" alt="BingMag.com Scientists have discovered a new type of stellar explosion" loading="lazy">

Graphic design of a binary star system whose white dwarf companion star material absorbs mainly hydrogen And causes a microwave explosion.
Credit: ESO/M. Kornmesser, L. Calada

Microwaves, however, are similar explosions that occur on a smaller scale and much faster, lasting only a few hours. These phenomena occur in some white dwarfs with strong magnetic fields, which direct matter toward the star's magnetic poles. "For the first time, we now see that hydrogen fusion can also occur locally," he said. "Hydrogen fuel can be placed at the base of the magnetic poles of some white dwarfs, so that fusion only takes place on these magnetic poles."

" They have about one millionth of a supernova explosion power and are therefore called microstructures. Although the word "micro" may mean that these events are small, make no mistake; "Only one of these eruptions could burn about 200,000 trillion kilograms, or about 3.5 billion of the Great Pyramid of Giza." Abundant than previously thought. "It shows how dynamic the world is," Scarring said. "These events may be very common, but because they are so fast, they are hard to see in practice."

Faced with these mysterious explosions. "Looking at the astronomical data collected by NASA, we discovered something unusual: a glowing flash of light that lasts only a few hours," Degnar said. "As we searched further, we found several similar signals."

This video shows an animation of a microwave explosion. The blue disk, which orbits the bright white dwarf in the center of the image, is made up of a substance that is mostly hydrogen abducted from a companion star. Moving toward the center of the disk, the white dwarf uses its strong magnetic fields to conduct hydrogen to its poles. As the material fell on the hot surface of the star, they created a microwave explosion that was surrounded by magnetic fields on one of the white dwarf poles.

Using Tess, the team observed three microwave explosions: two Cases of white dwarfs were known, but the third case required further observations with the X-shooter instrument at the Southern European Observatory's very large telescope to confirm its white dwarf status.

Observations were crucial in interpreting the outcome and ultimately the discovery of micronova. "With the help of the Southern European Observatory's very large telescope, we found that all of these light flashes were produced by white dwarfs," added DeGnar. The team now wants to record more of these elusive events that require large-scale mapping and rapid tracking measurements. "The rapid response of telescopes, such as the tech telescope, the very large observatory, and the range of instruments available, allows us to discover these mysterious microns in more detail," Scarring said.


Source: SciTechDaily

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