Perturbations of ultralight vector field dark matter
نویسندگان
چکیده
منابع مشابه
Fuzzy cold dark matter: the wave properties of ultralight particles.
Cold dark matter (CDM) models predict small-scale structure in excess of observations of the cores and abundance of dwarf galaxies. These problems might be solved, and the virtues of CDM models retained, even without postulating ad hoc dark matter particle or field interactions, if the dark matter is composed of ultralight scalar particles (m approximately 10(-22) eV), initially in a (cold) Bos...
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We show that dark matter could be made of massive gauge bosons whose stability doesn’t require to impose by hand any discrete or global symmetry. Stability of gauge bosons can be guaranteed by the custodial symmetry associated to the gauge symmetry and particle content of the model. The particle content we consider to this end is based on a hidden sector made of a vector multiplet associated to...
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The specified constant 4-vector field reproducing the spherically symmetric stationary metric of cold dark matter halo in the region of flat rotation curves results in a constant angle of light deflection at small impact distances. The effective deflecting mass is factor π/2 greater than the dark matter mass. The perturbation of deflection picture due to the halo edge is evaluated.
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his paper provides a review of the variants of dark matter (CDM, HDM) which are thought to be fundamental components of the universe and their role in origin and evolution of structures. Introduction The origin and evolution of large scale structure is today the outstanding problem in cosmology. This is the most fundamental question we can ask about the universe whose solution should help us to...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2017
ISSN: 1029-8479
DOI: 10.1007/jhep02(2017)064