arXiv Machine Learning By Micha{\l} Bejger

Approximating neutron-star radii using gravitational-wave only measurements with symbolic regression

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The paper presents a symbolic regression approach that derives an approximate expression for neutron‑star radii using only gravitational‑wave data from binary inspirals. By training on TOV solutions with piecewise polytropic equations of state, the authors obtain a formula that reproduces radii with differences of only a few hundred meters across a wide range of neutron‑star parameters. The method is validated on realistic dense‑matter EOSs and applied to the GW170817 event, comparing the inferred radii to existing distributions.

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