An Argument for Axion Dark Matter

  • Pierre Sikivie
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 148)


An argument is presented that the dark matter is axions, at least in part. It has three steps. First, axions behave differently from the other forms of cold dark matter because they form a rethermalizing Bose-Einstein condensate (BEC). Second, there is a tool to distinguish axion BEC from the other dark matter candidates on the basis of observation, namely the study of the inner caustics of galactic halos. Third, the observational evidence for caustic rings of dark matter is consistent in every aspect with axion BEC, but not with the other proposed forms of dark matter.


Dark Matter Sterile Neutrino Cold Dark Matter Galactic Center Lower Energy State 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



 I would like to thank the Aspen Center for Physics for its support (NSF Grant #1066293) and its hospitality while working on this paper. This work was supported in part by the U.S. Department of Energy under grant DE-FG02-97ER41209.


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© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Physics DepartmentUniversity of FloridaGainesvilleUSA

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