Rotating dark matter admixed neutron stars

Understand

We study rotating compact stars that are mixtures of the ordinary nuclear matter in a neutron star and fermionic dark matter.

• After deriving equations describing a slowly rotating system made up of an arbitrary number of perfect fluids, we specialize to the two-fluid case, where the first fluid describes ordinary matter and the second fluid describes dark matter.
• Electromagnetic observations of the moment of inertia and angular momentum directly probe ordinary matter and not dark matter.
• Upon taking this into account, we show that the I-Love-Q relations for dark matter admixed neutrons stars can deviate significantly from the standard single-fluid relationships.