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Solitonic axion condensates modeling dark matter halos

Authors :
Eckehard W. Mielke
David Castañeda Valle
Source :
Annals of Physics. 336:245-260
Publication Year :
2013
Publisher :
Elsevier BV, 2013.

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.

Details

ISSN :
00034916
Volume :
336
Database :
OpenAIRE
Journal :
Annals of Physics
Accession number :
edsair.doi...........82df2020b3a8954d3937020aa0bb59ab
Full Text :
https://doi.org/10.1016/j.aop.2013.05.007