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The Gargantuan UV flash from the supernova is now a cosmic secret



White dwarf stars have been doing some weird things lately. There was the one who had fallen into the half-burned Milky Way, and now it was discovered that the white dwarf, which was going through a supernova, emitted a terrible and mysterious UV flash.

This is not your typical supernova. Whatever it is, since it has no name yet, the phenomenon of a white dwarf exploding into UV light is so rare that it is the second time it has ever been observed. No one yet knows exactly how or why this will happen. Finding out what ignites such lightning could help reveal even more dark secrets, from how the universe forms heavy metals to cosmic acceleration that is thought to be caused by dark energy. Astrophysicist Adam Miller of Northwestern University and his team of researchers could find out.

“These are some of the most common explosions in the universe,”

; said Miller, who recently published a study in The Astrophysical Journal, stated in a press release. “What’s weird is the UV flash. Astronomers have been looking for it for years and never found it. “

There is definitely something unusual about this cosmic explosion (now known as SN2019yvq). Type Ia (one-A) supernovae are a typical way for the white dwarf’s binary systems to enter the throat of death, although they do not always complete what they began. Many of them are also luminous and brightest supernovae that are known to occur. White dwarfs made of carbon and oxygen constantly accumulate stellar matter until they reach the limit at which they eventually explode – the Chandrasekhar limit of 1.4 solar masses. This is thought to be the maximum mass that a white dwarf can reach without collapsing into a neutron star or black hole.

Human eyes caught a strange supernova the first day after the explosion. Using the Zwicky Transition Facility in California, scientists were able to say that it happened right next to the Draco constellation, and astrophysicists then took a closer look at X-ray and UV wavelengths at NASA’s Neil Gehrels Swift Observatory. SN2019yvq was initially classified as type Ia. It almost passed for one, but intense UV radiation could not be ignored. It was not a flash that was flashing. It took several days, which meant that something incredibly hot must have been in or at least near the dying star. With the exception of white dwarfs cooling when they fall.

UV light intensely needs something at least three or four times warmer than the sun. This is invisible to us because the UV wavelengths are too short for our eyes to process, and the X-rays have even shorter wavelengths. Previously, another team of scientists found ways to determine the properties of superlight supernovae using this type of light. Computer simulations that showed an event at UV wavelengths are the way in which the explosion mechanism behind this method was determined, and this method can be used to identify explosion mechanisms in other supernovae. That goes on.

“Most supernovae aren’t that hot, so you don’t get very intense UV radiation. Something unusual has happened to this supernova to create a very hot phenomenon, “said Miller.

Miller has four hypotheses about how this could happen. The dying white dwarf could accumulate gas and dust in the manner of the Ia supernova, which exploded when it exceeded the limit, and an exploded star that collided with another star in the binary system caused a UV flash. Perhaps there was radioactive material in the core that heated the outer layer around the point without returning. There is a random helium that drastically raised the star’s temperature so high that the resulting double explosion also released a UV flash. Finally, it is possible that a huge amount of UV radiation radiated from the cosmos when two white dwarfs in the star system merged and the remnants of the explosion collided.

According to Miller, what actually caused these real films could be revealed in about a year. The ejecta will move further and further away from the source until the core of the explosion is exposed. Activate voltage.


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