A strange signal from space that astronomers can’t find an explanation for


When a massive star reaches the end of its lifespan, it uses up all its fuel and explodes. This phenomenon is known Supernova. After the explosion, the remnants of the star were summoned Neutron star– They are bunched up and squeezed into a very compact ball. Then the neutron star begins Spins at an almost incredible speedMakes a turn in fractions of a second.

However, a detractor was found. A team of scientists has discovered that star ASKAP J1935+2148 Afternoon 54 minutes to complete the cycle. The study, led by scientist Manisha Caleb from the University of Sydney and Emil Lenk from Australia’s National Science Institute, CSIRO, has already been published. Nature To the fascination of astronomers.

What happened to J1935+2148: Exploded 16 billion light years ago (Its signal has now reached Earth). As is usual in supernovae, a neutron star formed from its remnants. Now comes the peculiarity: neutrons They move very slowly Compared to its other supernova sisters. It’s like you register a tricycle to race in Formula 1.

“We are used to extremes in the study of radio-emitting neutron stars, but this discovery of a small star It spins very slowly and is still emitting radio waves, which is unexpectedBen Stoppers, professor of astrophysics at the University of Manchester and a participant in the study, explains.

What is a supernova?

The researchers did not rule out that the signal was actually a star A white dwarf with a very strong magnetic field. However, it is seen isolated, there aren’t many magnetic white dwarfs around, so the theory of a neutron star, which is a tricycle, is getting stronger. In any case, Further research is needed To know exactly what was discovered.

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The size of a supernova is hard to fathom. It was the biggest explosion a human could imagine. In an instant, a supernova Releases the energy of 10³° nukes (a 1 followed by 30 zeros). Then, they concentrate all of the star’s mass into a very small space. As for ASKAP J1935+2148, its mass is 1.4 times that of the Sun, and after its explosion, it packed that amount into a 10-km radius.

Explained by NASA, supernovae are not very common. They are the only ones produced Two or three every century in galaxies like our Milky Way. Scientists sometimes use supernovae to measure the distance of the universe.

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