Tuesday, July 15, 2014

Solved mystery of matter out of black holes supermaciços

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One of the oldest mysteries about the dynamics of black holes supermaciços, and their impacts on galactic evolution, was revealed by an international team of astrophysicists.

Through the ESO Very Large Technical (VLT), located in the Atacama desert, in northern Chile, researchers from the United Kingdom, Netherlands and United States have studied the nucleus of a nearby galaxy of the milky way with great detail. The Galaxy, called IC5063, has a black hole supermaciço which seems to have central jets of fast exit of molecular hydrogen. The IC5063 is a very active Seyfert Galaxy with bright core.

Many active galactic nuclei were observed with these jets of hydrogen and, once the molecular hydrogen is key to the formation of stars, astronomers have concluded that his ejection has impacts on star formation and, as such, in galactic evolution.

Supermaciços black holes are the largest type of black hole, with solar masses in the hundreds of thousands of millions. It is believed that all, or almost all, of the galaxies have a supermaciço black hole at its Center. Thus, the activity of these super black holes can control the amount of gas supplied to the regions of star formation.

But how is that black holes propel this hydrogen thousands of miles per hour? Until now, scientists have not realized how was the process. On the basis of the comments made by the VLT, astrophysicists found that the output of hydrogen is propelled by jets of relativistic electrons, which are ejected from the dynamic environment of the black hole. Whenever highly energetic electrons pass through the clouds of molecular hydrogen, the gas is transported out of the Galaxy, serving of food to the nurseries of stars.

"Much of the gas that comes out is in the form of molecular hydrogen, which is fragile in the sense that it can be destroyed with relatively low energies," says Clive Tadhunter, University of Sheffield, who led the research, cites the Discovery News.  "It is extraordinary that the molecular gas can survive the acceleration of electron jets that move at speeds close to the light", indicates the astrophysicist.

The research was published in Nature and provides a little clue of what may happen to the milky way when it collides with the nearby Andromeda, in five billion years. The merger of the two galaxies will inject material into the Centre of black holes supermaciços, giving rise to powerful jets of molecular hydrogen. When this occurs, the matter for the formation of new stars will occur by changing the evolutionary result of the milky way.

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