Speaker
Description
A stochastic gravitational-wave (GW) background of cosmological origin is a prime target for present and forthcoming detectors, from pulsar–timing arrays to LISA. In this talk I present new results on GW production during cosmological first-order phase transitions, obtained with the recently developed Higgsless simulation framework. From these simulations we derive a set of GW templates built within a generalized modelling scheme that extends the standard sound-wave description to include damped sources, thereby allowing to capture the saturation of the GW amplitude at long source durations. I will report insights into strong transitions, showcase the first high-resolution Pencil-Code simulation results utilizing the Higgsless approach, and demonstrate how spectra can be generated on the fly with the open-source Python package CosmoGW.
