3 papers
gr-qc2025
An asymptotic systems approach for the good-bad-ugly model with application to general relativity
Miguel Duarte, Justin C. Feng, Edgar Gasperín +1
We employ an adapted version of Hörmander's asymptotic systems method to show heuristically that the standard good-bad-ugly model admits formal polyhomogeneous asymptotic solutions…
gr-qc2024
Twistor initial data characterisation of pp-waves
Edgar Gasperin, Francisco Pais
This note gives a concise derivation of a twistor-initial-data characterisation of pp-wave spacetimes in vacuum. The construction is based on a similar calculation for the Minkowsk…
gr-qc2022
Regularizing Dual-Frame Generalized Harmonic Gauge at Null Infinity
Miguel Duarte, Edgar Gasperín, Justin C. Feng +1
The dual-frame formalism leads to an approach to extend numerical relativity simulations in generalized harmonic gauge (GHG) all the way to null infinity. A major setback is that w…