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Visible light emitted from a black hole has been detected for the first time

For the first time, astronomers have detected the explosions of light, being emitted by a black hole located at a distance of about 7,800 light years away from Earth. This is because the black hole devours matter from the stars present close to it. This emitted light continued to sparkle for about some minutes to few hours. Astronomers noticed that this light is coming from a black hole present in the Cygnus constellation. The researchers say that those flashes of light were shining so brightly that even a layman could see them with an ordinary 20cm telescope.

One of the researchers, Mariko Kimura from Kyoto University in Japan said that “We observed this event in the surrounding of a black hole at low light for the first time. This discovery shows that we can explore all the processes happening in the surrounding of a black hole not just with a high-spec X-ray or gamma-ray telescopes but also with a modest telescope”. As we all know that nothing, not even light can cross a black hole once it goes in. But the phenomenon of devouring gas, dust or wrenching apart stars can develop an Accretion Disk in the vicinity of event horizon. 

These disks can generate streams of plasma called Relativistic Jets in the whole galaxy having a temperature of 10 million degrees Celsius or even more than this.

Kimura and her team detected that this fierce heat can cause the black hole accretion disk to emit a vivid radiance, they noticed this while observing the black hole V404 Cygni, which is present in the Cygnus constellation. This black hole has energized again on 15 June 2015 after 26 years of quiescence.

For the last two weeks, astronomers could see the sparkling of light emitted by this recently energized V404 Cygni. It is one of the closest black holes to Earth.

NASA’s Swift space telescope found it for the first time, then it was further persued by the Japanese researchers, who designated scientists from 26 places all around the globe to moniter V404 Cygni through their optical telescopes.

The V404 Cygni was reactivated due to the strong gravitational pull of its associative star that pulled both in too close.

For the first time, astronomers have detected this light generated by a black hole using optical telescopes. The researchers theorized that this light emerges from X-rays produced in the centre of the accretion disk, and these X-rays glow and heat up the surrounding of disk due to which it discharge optical rays.

But it is needed to study more about this. Daisuku Nogami said that we're delighted that our international observation network came together to report this exceptional event.


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