Speaker
Description
Gamma-ray bursts (GRBs) show several empirical correlations that constrain their central engines, relativistic outflows, and radiation processes. One of the best known afterglow relations is the Dainotti anti-correlation between the X-ray plateau luminosity and the rest-frame plateau duration. Here we use symbolic regression to compare this relation with other low-dimensional correlations in the data. We first verify that symbolic regression can recover the Dainotti relation and then perform an unrestricted search for alternative analytical expressions. We find that correlations incorporating the prompt peak luminosity provide a better empirical description of the observations
than the classical two-parameter Dainotti relation, suggesting that the latter may be a projection of a more fundamental prompt–plateau relation.