Astronomers Spot Monstrous Baby Galaxies Wrapped In Dark Matter

Posted: Dec 4 2015, 10:40pm CST | by , Updated: Dec 5 2015, 7:39am CST, in News | Latest Science News

Monstrous 'Baby' Galaxies Found Wrapped in Dark Matter

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Using ALMA, astronomers have spotted a clusture of massive, young galaxies.

A cluster of massive, youthful galaxies has been spotted in distant universe. Using powerful Atacama Large Millimeter/submillimeter Array or ALMA, Japanese astronomers have found a group of ‘baby’ galaxies wrapped inside the web of dark matter.

Long before when Sun and Earth were formed, monstrous galaxies were abundant in universe and they were producing stars at a very fast rate which was hundreds or thousands of times what we observe today in our galaxy Milky Way. But the modern universe is without giant galaxies.

The latest observations could help answer the questions about the formation of our universe, how baby galaxies were formed, how they mature into massive elliptical galaxies and why the massive galaxies not exist in our universe anymore.

Current theories suggest that massive star-forming galaxies require locations where dark matter is particularly concentrated. But up until now they have not been confirmed because these galaxies are obscured in clouds of dust which makes it difficult to determine their actual position.

Astronomers believe these young galaxies, which are located 11.5 billion light years away from the Earth, evolve into giant elliptical galaxies and the new group of young galaxies will provide them the opportunity to test all the current galaxy formation theories.

To hunt monstrous galaxies, a team of astronomers led by Hideki Umehata used European Southern Observatory’s ALMA to make extensive observations of a small portion of sky named SSA22 in the constellation Aquarius.

Previously, ASTE also indicated that there may a cluster of giant galaxies in that area of the sky but now ALMA with ten times better sensitivity and 60 times better resolution has confirmed the location of nine giant galaxies in SSA22. It further indicates that galaxies are residing at gigantic filaments, knitting a huge 3D web of invisible dark matter.

These findings can help understand the rest of the large-scale structures in the universe and the relation between dark matter concentration and monstrous galaxies.

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Hira Bashir covers daily affairs around the world.




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