Sixteenth Marcel Grossmann Meeting

Hunting for the Stochastic Gravitational-Wave Background

6 Jul 2021, 08:40

30m

Invited talk in the parallel session Sources of Gravitational Waves Sources of Gravitational Waves

Speaker

Mairi Sakellariadou (King's College London)

Description

I will first define the stochastic gravitational-wave background (SGWB) and highlight the method we are using to detect it in the presence of correlated magnetic noise. I will then discuss astrophysical and cosmological sources and report on the current constraints imposed from a non-detection during the first three observing runs of the LIGO/Virgo/KAGRA collaboration. I will also address the question of a simultaneous estimation of astrophysical and cosmological SGWB. Then I will present a search for circularly polarised SGWB and its relation to early universe cosmology. Finally, I will discuss how the SGWB can provide tests for gravity theories, including quantum gravity proposals.