A Bayesian investigation of the neutron star equation-of-state vs. gravity degeneracy

Understand

Despite its elegance, the theory of General Relativity is subject to experimental, observational, and theoretical scrutiny to arrive at tighter constraints or an alternative, more preferred theory.

• In alternative gravity theories, the macroscopic properties of neutron stars, such as mass, radius, tidal deformability, etc.
• are modified.
• This creates a degeneracy between the uncertainties in the equation of state (EoS) and gravity since assuming a different EoS can be mimicked by changing to a different theory of gravity.