Rotating Axion Boson Stars

Understand

We construct and study rotating axion boson stars (RABSs).

• These are the spinning generalisations of the spherical gravitating solitons recently introduced in arXiv:1909.05515.
• RABSs are asymptotically flat, stationary, axially symmetric, everywhere regular solutions of the Einstein-Klein-Gordon theory, in the presence of a periodic scalar potential arising in models of axion-like particles.
• The potential is characterised by two parameters: the mass of the scalar field $m_a$ and the decay constant $f_a$.