Stochastic gravitational wave background: Methods and implications

Beyond individually resolvable gravitational wave events such as binary black hole and neutron star mergers, the superposition of many more weak signals coming from a multitude sources is expected to contribute an overall background, so-called stochastic background. In this review, we give overview possible detection methods in search for background provide detailed review data-analysis techniques, focusing primarily on current Earth-based interferometric gravitational-wave detectors. addition, various validation techniques aimed at reinforcing claim are discussed well. We conclude by listing some astrophysical cosmological implications resulting upper limits waves.