Speaker
William Lamb
Description
Strong evidence has been published for a nanohertz-frequency gravitational wave background by pulsar timing arrays (PTA), and there is considerable excitement as to its possible source(s), including cosmological sources. Spectral characterisation of GWB sources is challenging and slow in standard Bayesian analyses, in particular as PTA data sets continue to expand. In this talk, I will introduce a suite of faster and simpler refit techniques for spectral characterisation of the GWB to accelerate spectral characterisation. I will also present some preliminary results on the possibility of distinguishing between multiple background signals, and the possibility of determining a cosmological source for the GWB.
