Jakarta –
Astronomers suspect, they detected a flash of light from black hole for the first time. This light arises from the event of joining two black holes into one.
This event was detected on May 21, 2019, when astronomers used the Virgo interferometer and the National Science Foundation’s Laser Science Gravity-wave Observatory (LIGO) Interferometer.
At that time, they detected a gravitational wave signature that was consistent with when two black holes joined. The event, referred to as S190521g, initially appeared to produce no visible light.
And as quoted from Gizmodo, physicists have thought that black holes cannot emit light when they collide with each other.
Subsequent reviews of data collected at a different observatory, the Zwicky Transient Facility (ZTF) at Caltech University, yielded evidence of the light coming from the same event.
If confirmed, this will be the first discovery in the world of astronomy because of its nature black hole which is known so far to absorb light.
The research, led by astronomer Matthew Graham from Caltech University, is published in the scientific journal Physical Review Letters.
The colliding neutron stars and the rest of the exploding star, produce all types of emission spectrum including infrared, ultraviolet, visible light, x-rays, gamma rays and radio waves.
On the other hand, the joining of a black hole will emit radiation that can be detected in the form of gravitational waves which are motion in space itself.
Joining a black hole to produce light indicates that something extraordinary has happened.
The S190521g event occurred near a supermassive black hole at the center of our galaxy. This black hole is surrounded by a giant disk filled with gas, dust and various other objects ranging from asteroids, stars, to smaller black holes.
“These objects are clustered like angry bees around queen bees. They can briefly find their gravitational partner but usually lose their partners quickly because of the pull of gravity,” said KE Saavik Ford, an astronomer at City University of New York (CUNY) who co-authored this research.
In the case of S190521g, the newly joined black hole then glides in an astrophysical event known as ‘kick’. This event causes the black hole to glide at high speed until it triggers a reaction with the surrounding gas which produces a very bright and long-lived flame.
“This supermassive black hole blazes for years before a new flare of light appears. Light occurs at the time scale and at the right location, together with the gravity-wave event,” Graham said.
“In this study, we conclude that the flare is likely the result of a union black hole, but we cannot completely rule out the possibility, “he said.
Other possibilities of the appearance of this light include supernovae or tidal disturbance, where the star crashes into a black hole.
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