Abstract
The large-scale structure of DM cannot be directly seen, but it is believed it can be inferred from the distribution of visible galaxies formed from ordinary matter. Bright visible galaxies that emit the Lyman α (Lyα) emission line of the hydrogen atom (Lyα galaxies) are used to observe the large-scale structure of distant space. However, recently Momose et al. have reported cases where the large-scale structures of DM indicated by Lyα galaxies and other galaxies fail to match. This raises the possibility that Lyα galaxies may not correctly indicate the large-scale structure of DM. In the currently accepted cold DM model, DM and neutral hydrogen gas are thought to interact only through the mutual effects of gravity. However, according to Suto, DM and ordinary matter are like two sides of the same coin. By giving and receiving approximately 2mec2 (1.022 MeV), it is possible to mutually convert between the two. If, in future observations of the density distribution of interstellar gas using Lyα emission lines, unexpected data is obtained that cannot be explained based only on absorption by neutral hydrogen gas, then the author believes the problem can be solved with Suto’s DM model.
Highlights
It is believed that the largest structures in the universe are large-scale structures made of dark matter (DM), a material which cannot be directly observed
The large-scale structure of DM cannot be directly seen, but it is believed it can be inferred from the distribution of visible galaxies formed from ordinary matter
According to Suto, DM and ordinary matter are like two sides of the same coin
Summary
It is believed that the largest structures in the universe are large-scale structures made of dark matter (DM), a material which cannot be directly observed. The large-scale structure of DM cannot be directly seen, but it is believed it can be inferred from the distribution of visible galaxies formed from ordinary matter. Bright visible galaxies that emit the Lyman α (Lyα) emission line of the hydrogen atom (Lyα galaxies) are used to observe the large-scale structure of distant space. The three types of galaxies are as follows: 1) Lyα galaxies 2) Continuous light galaxies which emit light uniformly at all wavelengths 3) Visible emission line galaxies which shine with the green emission line emitted by oxygen Momose et al divided into the near side of each galaxy (region close to the earth) and far side of each galaxy (region beyond the galaxy) and observed the intergalactic gas density distribution. In the opinion of Suto, neutral hydrogen gas is not the only thing that can absorb Lyα emission lines
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