Information about so-called “galactic events,” i.e. strong and obviously abnormal gas explosions from galaxies, is contained in a new study published in Nature and prepared by Alison Coil of UC San Diego, David Rupke of Rhodes College and other colleagues.
Gas emissions occur in the so-called Circalactic Environment (CGM), an area around galaxies that is, among other things, also very important for the formation of such an environment and its evolution. Researchers have studied a galaxy called Makani, which at an advanced stage is the result of the merger of two galaxies of the same mass. It is through this fusion that the gas of the two galaxies is compressed, causing the birth of new stars.
In this case, it is likely that these new stars caused these giant leaks at the end of life, when they exploded as a supernova, as explained by the Coil itself, a professor of physics at UC San Diego. In particular, researchers have discovered two quite impressive gas outflows, “launched” from within the galaxy, one million years ago, hundreds of millions of years ago. What was “launched” hundreds of millions of years ago is now a long way from the galaxy since the last one.
“In terms of size and speed, both outbursts are consistent with their occurrence in past star explosions; they are also consistent with theoretical models of how big and fast winds should be if they are created by star explosions,” says Cole.
These areas around the galaxies are very important because it is in these outer areas, not inside the galaxies, that most of the gas found in the universe is present. Researchers used data collected by the WM Keck Observatory, the Hubble Space Telescope and the large millimeter array Atacama (ALMA).
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