Spectral separation of the stochastic gravitational-wave background for LISA: observing both cosmological and astrophysical backgrounds

Understand

With the goal of attempting to observe a stochastic gravitational wave background (SGWB) with LISA, the spectral separability of the cosmological and astrophysical backgrounds is important to estimate.

• We attempt to determine the level with which a cosmological background can be observed given the predicted astrophysical background level.
• We predict detectable limits for the future LISA measurement of the SGWB.
• Adaptive Markov chain Monte-Carlo methods are used to produce estimates with the simulated data from the LISA Data challenge (LDC).