Speaker
Description
The astrophysical Stochastic Gravitational Wave Background (SGWB) is the superposition of all the compact binary merger events that go undetected as individual events along with other sources such as supernovae, magnetars, etc. The individual gravitational wave (GW) signals from these events vary over time, depending on the source parameters. The timescale of the individual events along with the timescale of the interval between two events gives rise to the correlation between different frequency modes in the signal covariance matrix of the SGWB. The structure of the covariance matrix can be shown be depend on the population parameters. This structure in the covariance matrix provides extra information about the source population on top of the power spectrum. In this work, we demonstrate that utilizing this additional information significantly improves the Figure of Merit when compared to the case with only power spectrum for the LIGO-Virgo-KAGRA (LVK) network of detectors with the design sensitivity noise with two years of observation. Incorporating this spectral correlation in SGWB in the analysis of the SGWB signal will prove advantageous for detecting the SGWB signal within the LVK frequency bands as well as even at lower frequencies.
| mohitrajsah9@gmail.com | |
| Affiliation | Tata Institute of Fundamental Research, Mumbai, India |
