Scalar- and Vector Dark Matter Admixed Neutron Stars

Understand

It is believed that dark matter (DM) could accumulate inside neutron stars and significantly change their masses, radii and tidal properties.

• We study what effect bosonic dark matter, modelled as a massive and self-interacting scalar or vector field, has on neutron stars.
• We derive equations to compute the tidal deformability of the full Einstein-Hilbert-Klein-Gordon system self-consistently, and probe the influence of the scalar field mass and self-interaction strength on the total mass and tidal properties of the combined system, called fermion boson stars (FBS).
• We are the first to combine Proca stars with neutron stars to mixed systems of fermions and a vector field in Einstein-Proca theory, which we name fermion Proca stars (FPS).