We are half a matter of other galaxies
the latest research findings suggest that half (which is much more than anticipated in earlier studies), matter of the Milky Way, including the atoms of which we are composed, could come here from outside our galaxy. These findings were made on the basis of conducted simulations using supercomputers. Because of this, scientists were able to identify a new phenomenon, known as the intergalactic transport. And he, according to the researchers, may help us to discover the secrets of the galaxies.
Modeling, conducted by a team of astrophysicists at Northwestern University showed that supernova explosions are able to dispose of a large volume of gas outside the galaxies in which they reside. The atoms of the matter is transferred from one to another galaxy with powerful galactic winds.
"Given how much the matter of which we are made, could come from other galaxies, we can confidently consider themselves intergalactic space travelers or immigrants," - said the lead researcher of the project, Daniel Alcazar Angles.
"Probably a large part of the matter of the Milky Way was originally belonged to other galaxies, and then was thrown out of them strong winds, thanks to which she crossed intergalactic space and finally found a new home in our galaxy."
Simulations show winds flows between galaxies
In spite of the opinion that these intergalactic wind was very fast - possibly at a speed of several hundred kilometers per second - the vast distances separating the galaxies allowed the atoms to move from one galaxy to another only after billions of years.
Using a simulation system FIRE (Feedback In Realistic Environments), the researchers were able to create a realistic 3D-models of the evolution of galaxies and the Big Bang to the present day. The researchers then used special algorithms to process the data of the mother who galaxies could in itself absorb from other sources. It turned out that huge amounts of gas flowed from small galaxies to form larger, like our own Milky Way.
Larger galaxies originally had a large supply of matter. In addition, the material trapped in them from other sources, difficult to leave such a galaxy. The fact that matter can pass from one to the other galaxies, scientists have long known. Unknown was a scale and possible scope of this matter. And according to a new study, the atoms of matter large galaxies like the one in which we live, may be rooted for millions of light years away.
"This study changes our understanding of how galaxies formed after the Big Bang," - said Claude-Andre Faucher-YIG, one of the researchers.
Galaxy are a large cluster of stars linked together by the gravitational attraction of the mass of a single source, whose role is usually played by supermassive black holes that are right in their centers. However, almost immediately after the Big Bang about 14 billion years ago, no stars and no galaxies. The space was filled with a homogeneous gas.
Slight changes in the flows of gas and the gravity pool eventually led to the formation of the first stars, clusters and eventually galaxies. New same study, according to scientists, gives a fresh perspective on the understanding of galaxy formation process.
"It turns out that we are not that" local. " This study gives us an idea of how to be connected to each other distant objects in the sky, "- said Faucher-YIG.