Fig. 3: Evolution of the obtained constraints on c3.
From: Inferring three-nucleon couplings from multi-messenger neutron-star observations
We show the prior on c3 (purple) as well as the present astrophysical constraints, which include GW170817 and the NICER X-ray observations of millisecond pulsars but exclude simulated data from next-generation GW observatories. The inferred c3 for our population study is then shown as a function of the number of events observed by a network of next-generation GW detectors for the 2-parameter (blue), 5-parameter (orange-dashed), and 7-parameter (green) EOS models. We observe that the constraints are well converged at 20 observations. For the 7-parameter model, the diamond error bar is obtained by analyzing 20 observations using parameter estimation on zero-noise injections, whereas the circle error bars are obtained within a Fisher matrix approximation. We compare the resulting constraints to the injected value and to the uncertainties in the laboratory result from πN scattering (black). All error bars represent 90% confidence levels. Source data for this figure are provided as a Source Data file.
