10–13 Jun 2025
École de physique, Quai Ernest-Ansermet 24, 1205 Genève, Suisse
Europe/Zurich timezone

Using Deep Learning to disentangle the cosmological and astrophysical Stochastic Gravitational Wave Backgrounds

11 Jun 2025, 12:00
20m
Main auditorium (École de physique, Quai Ernest-Ansermet 24, 1205 Genève, Suisse)

Main auditorium

École de physique, Quai Ernest-Ansermet 24, 1205 Genève, Suisse

talk GWs emitted before the CMB GWs emitted before the CMB

Speakers

Mr Bill Atkins (Swansea University) Matthew Di Ferrante (Independent Researcher)

Description

We apply a Convolutional Neural Network (CNN) to Pulsar Timing Array residuals to identify the cosmological contribution to the Stochastic Gravitational wave Background for a variety of different cosmological models.

We find the CNN can accurately identify the cosmological contributions, and reconstruct injected signals with at least as much success as current Bayesian methods, but with considerably greater model coverage.

We apply this to generate bounds on the amplitudes and spectral indexes for different cosmological models required to disentangle the two contributions.

Primary authors

Mr Bill Atkins (Swansea University) Matthew Di Ferrante (Independent Researcher)

Presentation materials