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Ratio baryonic versus non-baryonic matter in the Universe.
The article:
https://www.newscientist.com/article...finally-found/ claims that: "Half the universe's missing matter has just been finally found" implying that a lot of dark matter is not non-baryonic but baryonic (i.e. ordinary matter) The article mentions: https://arxiv.org/abs/1709.10378v1 with the title: "Missing baryons in the cosmic web revealed by the Sunyaev-Zel'dovich effect" https://arxiv.org/abs/1709.05024 with the title: A Search for Warm/Hot Gas Filaments Between Pairs of SDSS Luminous Red Galaxies A article in with a different opinion: https://www.forbes.com/sites/startsw...g-matter-foun= d-but-doesnt-dent-dark-matter/#499df136faf7 "Missing Matter Found, But Doesn't Dent Dark Matter" This article reads: "The fact that about 5% of the Universe's energy is in normal matter, 27% is dark matter, and the other 68% is dark energy has been known for nearly 20 years now, but it remains as puzzling as ever." Most(?) of this comes from studying the CMB radiation. The article also states: "But light plays a major role, too. Stars shine etc so measuring the light coming from all of them tells you how much mass there is." The problem of course is that there is a lot of (?) baryonic matter which does not shine. https://en.wikipedia.org/wiki/Cosmic...ave_background We read: "The angular scale of the first peak determines the curvature of the universe (but not the topology of the universe). The next peakā=80_ratio of the odd peaks to the even peaksā=80_determines the reduced baryon density. The third peak can be used to get information about the dark-matter density." I assume the non-baryonic density. This raises a serious issue: How can these CMB peaks be trusted and be used to make predictions when observations reveal that the ratio baryonic versus= non-baryonic matter has changed? Nicolaas Vroom |
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