"Matter Hidden In The Remains Of Collision Of The Galaxies"," The number of revolutions abnormally fast of these discs indicates that the total mass of the spiral galaxies is quite higher than the visible star and gas mass: the galaxies contain great quantities of hidden matter, called ""black"", from which precise nature escapes still today the physicists, but who according to traditional cosmological scenarios' would reside in a wide spheroid halation, rather than in the discs.
An international team carried out within Laboratory AIM by researchers of the ECA (3) and CNRS studied the remains of collision of a galaxy, NGC5291, using observations radios obtained with Broad Very Array (4) and of a digital model of the formation of this system.
The impact would have formed a gigantic gas ring which today extends on nearly 500.
The researchers highlighted in several of these condensations abnormally high speeds of gas, attesting of a total mass three times higher than the visible mass in the form of gas or of stars.
This result published by the review Science, is particularly unexpected.
And thus the hidden mass detected in the remains of these collisions can come only from the discs of the spiral galaxies.
However, among the candidates, most natural would be very cold molecular hydrogen, detectable with much difficulty contrary to traditional interstellar gas.
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