Open gas giant galactic storms


12/05/2011

Using a camera with a low-resolution spectrometer on board the Herschel Space Observatory, an international team of scientists led by the Max Planck Institute, discovered the molecular gas giant storms raging in the center of many galaxies.

Some of these massive gusts reaching speeds of more than 1,000 kilometers per second, which is thousands of times higher than the rate of hurricanes on Earth. Observations show that the more active galaxies have stronger winds, which can completely blow away all the gas reserves, slowing the formation of stars and the growth of the central black holes. This is the first convincing evidence of the role of galactic winds in the evolution of galaxies.

In more remote, and therefore much younger regions of the universe, many galaxies show activity, which is much higher than that of the Milky Way. At taken to date in the scientific community of evolutionary scenarios, galaxies with a high content of gas begin to merge, causing a burst of star, as well as the growth of supermassive black holes at their center. But such an accelerated activity lasts only a few million years before the formation of new stars and the growth of black holes is terminated. What processes can be responsible for such a sudden (on a cosmological standards) necessary for the disappearance of these processes of matter (about a billion solar masses).

The answer to this question can be powerful winds that blow gas out of the center of galaxies.

This study made it possible not only to observe the transitional stage of the evolution of galaxies from the disk of the galaxy with a lot of young stars and a large proportion of the gas content in the elliptical galaxy with old stars and have a low content of gas. In addition, it helps to explain another empirical property: the mass of black holes in the center and the mass of stars in the inner region of the galaxy correlation. This correlation is a natural consequence of the detected galactic winds, which blow away tanks of gas, halting the formation of stars and the growth of black holes.

Need to perform additional research to discover the cause of these winds.

Original: Sciencedaily


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