Black Hole Collision|Astronomers have detected the most powerful, most distant and most perplexing collision of black holes. It has been observed by the LIGO and Virgo collaborations, which involve nearly 1,000 scientists working around the globe. They have found 10 black hole mergers and one neutron star merger.
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| This image is showing that a black hole collision has been taken place |
But, firstly we have to know how are black holes formed?
A black hole can be formed by the death of a massive star. When such a star has exhausted the internal thermonuclear fuels in its core at the end of its life, the core becomes unstable and gravitationally collapses inward upon itself, and the star's outer layers are blown away.
If we say in a short brief, a black hole can be formed when there is a celestial object whose mass will be 1.44 times higher than the mass of the sun.
The merger, named as GW190521 (GW for Gravitational Waves), was observed by the LIGO and Virgo detectors is a gravitational wave signal resulting from the black hole collision, on
21 May 2019 at 8:30 am IST, resulting in the formation of a supermassive black hole as it was possibly associated with a coincident flash of light. The event was 7 billion light years away.
Among the collision of black holes, one weighed 85 times the mass of the sun, while the other was 66 times the solar mass. The remnant left over from the merger is a black hole with a mass that’s approximately 142 times that of the sun.
The Universe was only about seven billion years old, which is roughly half its present age, when the black holes merged.
So, how did black hole collision took place?
Once they are very close to each other, then this collision takes place and once they had merged, the single hole settles down to a stable form, via a stage called ringdown, where any distortion in the shape is dissipated as more gravitational waves. And Supermassive binary black hole have been formed which weighs a whopping 142 times the mass of the Sun, by far the largest black hole ever observed through gravitational-wave observations.
Black holes of mass 100 to 100,000 solar masses are called intermediate mass black holes (IMBHs). They are heavier than stellar mass black holes but lighter than supermassive black holes often located at the centers of galaxies. There have been no conclusive electromagnetic observations for IMBHs in the mass range 100 to 1,000 solar masses.
Another recent fact says that scientists using Caltech’s Zwicky Transient Facility may have spotted a light flare from the black hole collision. This is surprising, as black holes and their mergers are normally dark to telescopes.
One theory is that the system may have been orbiting a supermassive black hole. The newly formed black hole may have received a kick from the collision, shooting off in a new direction and surging through the disk of gas surrounding the supermassive black hole, causing it to light up.
There are a number of different environments in which this system of two black holes could have formed, and the disk of gas surrounding a supermassive black hole is certainly one of them.
But it is also possible that this system consisted of two primordial black holes that formed in the early Universe.
Every observation we made for this black hole collision gave us a new and mindboggling information about the lives of black holes throughout the Universe.
Black holes are a huge mystery for everyone, but in the other hand, interesting as well.
See also: (How the universe is going to an end)
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