2021-10-04

Super large telescope finds some missing matter in the universe

By yqqlm yqqlm

This unique observation is described in detail in a research report published on mnras on September 16, 2021, which helps to reveal the location of some missing matter in the universe and observe the formation of nebulae around galaxies</ p>

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p > galaxies are like star islands in the universe. They have ordinary or baryonic matter, composed of elements in the periodic table and dark matter. Their composition is still unknown. One of the main problems in understanding galaxy formation is that about 80% of the baryons that make up the normal matter of galaxies are missing. According to the model, they are expelled from galaxies to intergalactic space by the Galactic wind generated by star explosion</ p>

Super large telescope finds some missing matter in the universe </ P >

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p > left: the boundary between quasars and galaxies studied here, GAL1. Middle: a nebula composed of magnesium, expressed in size ratio. Right: the superposition of nebula and GAL1 galaxy</ p>

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p > the team successfully used the Muse instrument to draw a detailed map of the communication between young galaxies and nebulae (gas and interstellar dust clouds) in the wind-driven formation of the Milky way. The team chose to observe galactic Galaxy GAL1 because it is very close to a quasar, which is the “Lighthouse” of scientists and guides them to the research area. They also plan to observe a nebula around the galaxy, although the success of this observation was initially uncertain because the brightness of the nebula is unknown</ p> The perfect positioning of the Milky way and quasars and the discovery of gas exchange caused by the Galactic wind make it possible for them to draw a unique map. This allows us to observe for the first time a forming nebula that emits and absorbs magnesium, some missing Baryons in the universe, simultaneously with GAL1 galaxy. This type of normal matter nebula is known in the near universe, but their existence is only a hypothesis for young galaxies in formation</ p>

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p > scientists have therefore found some missing Baryons in the universe, thus confirming that 80-90% of normal matter lies outside galaxies. This observation will help to expand the model of galaxy evolution</ p>