The Dark Matter Enigma
نویسندگان
چکیده
منابع مشابه
The enigma of the dark matter
One of the great scienti®c enigmas still unsolved, the existence of dark matter, is reviewed. Simple gravitationa l arguments imply that most of the mass in the Universe, at least 90%, is some (unknown) non-luminous matter. Some particle candidates for dark matter are discussed with particular emphasis on the neutralino, a particle predicted by the supersymmetric extension of the Standard Model...
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There is a puzzling contradiction: direct observations favor a low-mass-density universe (0.2 ≤ Ωm ≤ 0.6), but the only model which fits universe structure over more than three orders of magnitude in distance scale has a mix of hot (neutrino) and cold dark matter providing a critical density universe. Models of an open universe (low Ωm) or one adding a cosmological constant (Λ) to provide a cri...
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There are several dark matter problems, each on a different scale. The standard way to prove the existence of dark matter is to compare dynamical estimates of the mass of an object (galaxy, cluster) with an evaluation of its population contents. Historically, we can distinguish four distinct problems : 1. the galactic force law in the solar neighbourhood 2. galactic halos 3. groups and clusters...
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ژورنال
عنوان ژورنال: Inference: International Review of Science
سال: 2020
ISSN: 2576-4403
DOI: 10.37282/991819.20.32