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A black hole dubbed ‘the Unicorn’ may be galaxy’s smallest one

Scientists have found what could be the little-understood black hole in the galaxies of Milky Street and the object nearest to our solar system – an object that is so curious they named 'the Unicorn.'

The researchers said that the black hole is about three times the mass of our sun and that it can be used to test the lower limits of these extra-dense structures with a gravitational force that cannot survive even the light. In the so-called binary star system numbered V723 Mon, a bright star called a red giant orbit with a dark hole.

Around 1,500 light-years from the Black Hole – the distance from Earth is 5.9 trillion miles (9.5 trillion km) in one year. It is also far behind, while it might be closest to us. In contrast, Proxima Centauri is four light-years from the nearest star to our solar system.

Those black holes form when massive stars die and their nuclei collapse.

The Ohio State University astronomical student Tharindu Jayasinghe, study lead author published this week in the journal, the Monthly Notices o Unicorn. "We named this black hole 'The Unicorn' partly because V 723 Mon is in a monochrome – which is a unicorn – and partly because it is a rather unique system"

Three types of black holes are available. The youngest, like the Unicorn, is the stellar-mass black holes created by a single star's gravitational collapse. There are giant 'supermassive black holes like the one in the middle of our galaxy, 26, 000 light-years away from Earth, four million times the mass of the sun. Few black holes in the intermediate-mass were also discovered anywhere in between with masses.

"It's obvious that evolution allows a variety of black holes. But a black three-solar hole is a great surprise. There are no excellent examples of how to create such a black hole, but I'm sure scientists will be working on this further now," said astronomy professor at the Ohio State University and co-author Kris Stanek.

"The Unicorn" falls into what the researchers referred to as a «mass gap» between the greatest known neutron stars, which are objects that were similarly formed by a collapse of a large star – around 2.2 times the mass of our sun and the smallest black hole at approximately 5 times the mass of the sun.

Jayasinghe said, "'The unicorn' is indeed the smallest possible black holes.

The heavy gravity of the Sun changes the form of its accompanying star in a process killed by tidal distortion, rendering it elongated rather than circular. These results on the accompanying star showed the existence of the black hole using earth-centered telescopes and orbital telescopes.

Jayasinghe said, "Black holes are electromagnetically dark, so difficult to locate.

Unlike other black holes orbiting a star, the substance drawn by the companion was not found to be 173 times lighter than our sun.

One with a mass 2,6 times that of our sun, which was spotted in other galaxies is the only smaller possible black hole, Jayasinghe said.

A black hole of around 1.000 light-years from Earth was identified last year by other physicists, but other researchers doubted whether it is a black hole.
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