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Home / china / Ten-year study reveals the phenomenon of fusion of "killer" galaxies – Science Exploration – cnBeta.COM

Ten-year study reveals the phenomenon of fusion of "killer" galaxies – Science Exploration – cnBeta.COM



The images taken by the NASA Spitzer Space Telescope are providing new knowledge about the "killer" galaxy phenomenon. These galaxies will close the formation of stars within the new galaxies together after the merger. Under correct (or erroneous) conditions, the collision and mixing of a pair of galaxies can destroy the process of allowing the stars to form, effectively destroying the combined galaxies.

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There are trillions of galaxies in the vast universe, some of which form groups of galaxies, some of which will interact. This interaction can be the two galaxies that pass orbit or dust and gas and twist your arms. Others can be high-speed collisions between two galaxies, or larger galaxies devouring smaller galaxies.

Then the galaxies bind together and two similar-size galaxies collide so slowly that they do not have enough impulse to separate again and form new galaxies. These occur only in a small number of interactions, but NASA says some of them can produce conditions that effectively close the formation of stars, which causes new galaxies to die when the older stars reach their end.

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The image of Spitzer is part of a study called LIRG Sky Survey (GOALS) on the day of the Great Observatory. The study continued for ten years and focuses on discovering how galaxies are part of the fusion. Our survey of more than 200 celestial bodies in the intergalactic community provides examples of the fusion of many "killer" galaxies. Since Spitzer works in the infrared spectrum of the spectrum, the image is presented in fake colors of 3.6 to 8.0 microns to produce starburst emissions and interstellar dust.

According to NASA, when two galaxies merge, one of the dangers is that combined galaxies can form a supermassive black hole in the center, absorbing most of the available gas and dust and preventing the appearance of the new star. Another possibility is that the fusion will produce a shock wave of an enormous black hole that will affect gas and dust and will shut the formation of stars again.

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This seems simple, but NASA emphasizes that this is really a complex relationship that involves new star formation, black hole mechanisms and other processes. To better understand this, the GOALS team is working with the Keck Observatory in Hawaii to find the shock waves in the combined galaxy.

The GOALS program includes not only the Spitzer Space Telescope, but also the NASA Hubble and Chandra Space Telescope, the ESS Herschel satellite, the Keck Observatory, the Very Large Antenna Archive of the National Scientific Foundation, and the Atacama Grande Matrix of the millimeter wave / submilimeter


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