Rahul Sharma

Abstract – Anisotropic radiation of gravitational waves during the final stages of merger of compact binary coalescence leads to a net radiation of linear momentum. This can cause the final black hole produced to have very high recoils (or kicks). Numerical relativity simulations are necessary for studying this phenomenon and to generate accurate fitting formulas in order to predict the kick from initial parameters. We have used the data from the SXS simulations available to calculate the kick for over 200 different cases and compared the result with existing fits available for the non-spinning, aligned spin and superkick cases. We have also investigated the more complicated precessing cases and explored the dependence of the kick on the angles that the spins make with the infall direction, close to merger.