10-year study reveals the phenomenon of fusion of "killer" galaxies – Science Exploration – cnBeta.com.br


Images taken by the NASA Spitzer Space Telescope are providing new insights into the "matador" galaxy phenomenon. These galaxies will close the formation of stars within the new joint galaxies after the merger. Under correct (or erroneous) conditions, collision and mixing of a pair of galaxies can destroy the process of allowing the formation of stars, effectively destroying the fused galaxies.


There are trillions of galaxies in the vast universe, some of which form clusters of galaxies, some of which will interact. This interaction can be the two galaxies passing or orbiting dust and gas and twisting their arms. Others may be high-speed collisions between two galaxies, or larger galaxies devouring smaller galaxies.

Then the galaxies merge and two galaxies of similar size collide so slowly that they do not have enough strength 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, causing new galaxies to die when the older stars reach their end of life.


Spitzer's image is part of a study called the Great Observatory's LIRG Sky Survey (GOALS). The study has lasted ten years and focuses on how galaxies form part of the merger. Our research with more than 200 celestial bodies in the intergalactic community provides examples of the fusion of many "killer" galaxies. As Spitzer works on the spectrum's infrared spectrum, the image is reproduced in false colors from 3.6 to 8.0 microns to produce starlight and interstellar dust.

According to NASA, when two galaxies merge, one of the dangers is that molten galaxies can form a supermassive black hole in the center, absorbing most of the available gas and preventing the new star from appearing. Another possibility is that the melt will produce a shock wave of a huge black hole that will impact the gas and dust and close the star formation again.


This sounds simple, but NASA emphasizes that this is actually a complex relationship involving new star formation, black hole mechanics, and other processes. To better understand this, the GOALS team is working with the Keck Observatory in Hawaii to find shockwaves in the fused galaxy.

The GOALS program includes not only the Spitzer Space Telescope, but also the NASA Hubble and Chandra Space Telescope, the ESA Herschel Satellite, the Keck Observatory, the National Science Foundation's Very Large Antenna Array and the Atacama Large. Matrix of millimetric / submillimetric wave.


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