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Updated: March 31, 2013 17:07 IST

Outcast black holes living on edge of Milky Way

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This undated hand out artist rendering provided by the Harvard-Smithsonian Centre for Astrophysics shows a view of the Milky Way's structure. As many as 2,000 black holes kicked away from their homes are now living on the outskirts of the Milky Way, says a new study.
AP This undated hand out artist rendering provided by the Harvard-Smithsonian Centre for Astrophysics shows a view of the Milky Way's structure. As many as 2,000 black holes kicked away from their homes are now living on the outskirts of the Milky Way, says a new study.

As many as 2,000 black holes kicked away from their homes are now living on the outskirts of our Milky Way galaxy, according to a new study.

Researchers from the University of California, Santa Cruz, used new computer simulations to look at how our galaxy grew through mergers with smaller galaxies.

Scientists believe that every galaxy may have a black hole at its centre. As galaxies merge, their central black holes merge too, building a super massive black hole millions of times the mass of the Sun.

But collisions between black holes create gravitational waves, which can kick a newly merged black hole out of its host galaxy, New Scientist reported.

Valery Rashkov and Piero Madau of the University of California, ran simulations that show 70 to 2,000 of these outcasts may now linger in the halo of the Milky Way, depending on the properties of the objects that collided.

Some might have been stripped bare, while others may carry a few clusters of stars and dark matter, said Avi Loeb of Harvard University, who has proposed a similar idea.

Though faint, these star clusters should be observable with current or future telescopes.

More In: Science | Sci-Tech

It is but logic strengthened by facts. Nothing can hang still without
any force and the force is gravitation of the black hole. Even without
merging of two galaxies, a few stars and smaller black holes existing at
the fringe of the galaxy, can be kicked out and I think it is a
continues process.

from:  tikku
Posted on: Mar 31, 2013 at 23:29 IST
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