Solitonic axion condensates modeling dark matter halos |
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Authors: | David Castañeda Valle Eckehard W Mielke |
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Institution: | Departamento de Física, Universidad Autónoma Metropolitana Iztapalapa, Apartado Postal 55-534, C.P. 09340, México, D.F., Mexico |
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Abstract: | Instead of fluid type dark matter (DM), axion-like scalar fields with a periodic self-interaction or some truncations of it are analyzed as a model of galaxy halos. It is probed if such cold Bose–Einstein type condensates could provide a viable soliton type interpretation of the DM ‘bullets’ observed by means of gravitational lensing in merging galaxy clusters. We study solitary waves for two self-interacting potentials in the relativistic Klein–Gordon equation, mainly in lower dimensions, and visualize the approximately shape-invariant collisions of two ‘lump’ type solitons. |
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Keywords: | Dark matter Universal axion Soliton Dark matter halo Galaxy cluster |
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