Spinning gauged boson and Dirac stars: a comparative study

Understand

Scalar boson stars and Dirac stars are solitonic solutions of the Einstein{Klein-Gordon and Einstein- Dirac classical equations, respectively.

• Despite the different bosonic vs: fermionic nature of the matter field, these solutions to the classical field equations have been shown to have qualitatively similar features [1].
• In particular, for spinning stars the most fundamental configurations can be in both cases toroidal, unlike spinning Proca stars that are spheroidal [2].
• In this paper we gauge the scalar and Dirac fields, by minimally coupling them to standard electromagnetism.