In 2007, scientists at the University of West Virginia first identified an unusually intense burst of radio waves from space. Since then, these high-speed radio bursts, or FRBs, have been a mystery astronomers.
They only knew they were FRB pulse radio waves and that FRBs come from places within our galaxy, the Milky Way and other galaxies.
However, researchers have recently identified the FRB, which was first found in 2019 with the world’s largest single-antenna radio telescope, called FAST. It is located in Guizhou Province in China. The FRB has been studied more with the help of VLA telescopes in the state of New Mexico in the USA. The FRB is in a very small galaxy, which is almost 3 billion light years from Earth. A light year is the distance that light travels in one year.
Scientists believe that extreme objects can release these fast radio bursts. These objects may include unusual types of stars such as neutrons. A neutron star is the center of a large star at the end of its life cycle that explodes as a supernova. The other is a magnetar, which is a neutron star with a very strong one magnetic field. And another possible cause of FRB is a black hole eating a nearby star.
Casey Lo is an astronomer at the California Institute of Technology. He was the co-author of a recent study from 2019 FRB which was published in the nature. He said FRBs are fast flashes of radio energy that turn on and off in just a millisecond. They can be observed throughout the universe. Some objects produce a storm of repeated FRBs, and some only fire once.
The 2019 FRB is repeated. Weaker radio signals continue between bursts, so it always seems to be “on”. The majority known The FRBs, almost 500 of them, are not repetitive.
Astronomers think that FRB is described in the nature study is only at the beginning of one’s life. It is still surrounded by dense material from the explosion of a supernova that created a neutron star. Scientists suspect that repeated bursts come from younger FRBs.
Di Li is the chief scientist of the FAST Telescope and the Chinese Academy of Sciences in Beijing. He is a co-author the nature study. He said: “We still call fast radio bursts a cosmic a mystery and rightly so. ”
Although FRBs are not yet fully understood, the new recurring FRB may help a scientist discover the cause of a radio burst. Many years ago, scientists faced a similar mystery with gamma-ray bursts. It is now believed that these events are the result of the death of very large stars, or the merging of neutron stars or magnets into a black hole.
But researchers have much more to learn about FRBs.
“We know more and more about occurrencewhere the springs live, how often they shoot … However, we are still chasing that golden measure that will give us definitive the answer to what causes them, “Lo said.
I’m Faith Pirlo.
Will Dunham wrote this article for Reuters. Faith Pirlo adapted it for learning English.
The words in this story
astronomer –N. a scientist who studies stars, planets and objects in space
pulse – n. a brief increase in the amount of electricity, light or sound
Light year – n. the distance that light travels in a year, about 9.5 trillion kilometers
supernova – n. a star that exploded, greatly increasing its brightness over a period of time
black hole – n. a very dense area in space where gravitational pull is so powerful that nothing, not even light, can escape
cosmic – adj. or relating to the universe or the universe
occurrence – n. an event or interesting event that can be observed and studied and that is not easy to explain or understand
definitive – adj. clear, certain, and unlikely to change
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