Colliding black holes may be present at the edges of spiral galaxies like Milky Way, say scientists

A latest study led by an Indian origin researcher, has found that the edge of spiral galaxies could be crowded with colliding black holes of massive proportions and hence the right place to host big black hole mergers.

Earlier, Sukanya Chakrabarti, Assistant Professor at Rochester Institute of Technology and her team have released the fourth-ever detection of gravitational waves coming from a black hole smash-up.

The latest findings, set to be published in 'Astrophysical Journal Letters' have also showed the similarities between the environments of our very own Milky Way and those dwarf galaxies.

Small satellites or dwarf galaxies were believed to be the only perfect place to host black-hole merges till the date as they don’t have many stars or heavy metals left over from supernovae. But unfortunately dwarf galaxies are hard to spot due to their low luminous quality, while big galaxies are easy to spot.

Researchers have further developed the ways to trace gravitational waves in the last one year.

"The metal content in the outer disks of spiral galaxies is also quite low and should be rife with black holes in this large area," Chakrabarti was quoted while talking about their researche.

"If you can see the light from a black-hole merger, you can pinpoint where it is in the sky, then you can infer the parameters that drive the life cycle of the universe as a whole and that's the holy grail for cosmology," she stated further.

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Moreover, with these findings, revealed to the world, now a much deeper understanding of the universe is possible and the group of scientists will be able to combine gravitational wave astronomy with traditional measurements of bands of light.

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According to scientists, even black holes, which are too dense for light to escape, have a gravitational wave and an optical counterpart, remnants of matter from the stellar collapse from which they formed.