In 2016, the Laser-interferometric gravitational-wave Observatory (LIGO) for the first time confirmed the existence of gravitational waves caused by the collision of two black holes. In April of this year, the Observatory has allowed to make another “first” documentary evidence of other cataclysmic phenomena. At this time, LIGO recorded as a black hole devours a neutron star, which also gave rise to gravitational waves.
In early April began the next long phase of the research aimed at the detection and study of gravitational waves. A month later, scientists decided to share what they found out in this stage. It is noted that at the end of April managed to register just two gravitational signal.
The first was caught LIGO April 25. Its source, according to preliminary data, was the merger of two neutron stars. The mass of these objects is comparable to the mass of our Sun, but their radius is only 10 to 20 kilometers. The source of the gravitational waves was at a distance of about 500 million light years from us.
The second event, dubbed S190426c, scientists have documented 26 APR. Astrophysicists believe that at this time the gravitational waves are born as a result of collision of a neutron star and a black hole at a distance of 1.2 billion light years from Earth (that is, the event itself occurred over a billion years ago).
Interestingly, only in April this year, the LIGO gravitational disasters recorded five pieces, which once again confirms how dynamic our universe.
2016 Observatory LIGO has gone through several upgrades and are now able to observe gravitational waves in more detail. These updates also allowed significantly more to fix the disasters that cause them, so much so that scientists don’t want to post about each such event a separate article.
At the same time, the absorption of a black hole neutron star aroused great interest among astrophysicists, as never observed before. The researchers are sure that we are talking about merging black holes and neutron stars.
“The fact that we have not fixed electromagnetic radiation, may indicate that an event has occurred so far that is more consistent with the system of a neutron star-a black hole. If we were talking about the merger of two neutron stars, their mass would not be enough to generate gravitational waves that could go such distances,” says team member LIGO Gabriela gonzález of Louisiana state University.
Unfortunately, to estimate the exact location of the source of these gravitational waves scientists have been unable, but have narrowed it down to three percent of the sky. According to researchers, if the disaster was accompanied by any visual component, it will sooner or later discover.
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