Gravitational-wave Emission from a Primordial Black Hole Inspiraling inside a Compact Star: a Novel Probe for Dense Matter Equation of State

Understand

Primordial black holes of planetary masses captured by compact stars are widely studied to constrain their composition fraction of dark matter.

• Such a capture may lead to an inspiral process and be detected through gravitational wave signals.
• In this Letter, we study the post-capture inspiral process by considering two different kinds of compact stars, i.e., strange stars and neutron stars.
• The dynamical equations are numerically solved and the gravitational wave emission is calculated.