Name: Lankeswar Dey
Affiliation: Tata Institute of Fundamental Research, Mumbai
Conference ID : ASI2022_664
Title : Modeling pulsar timing array signals induced by spinning supermassive binaries in relativistic eccentric orbits
Authors : Lankeswar Dey, Abhimanyu Susobhanan, A. Gopakumar
Abstract Type: Oral
Abstract Category : General Relativity and Cosmology
Abstract : Supermassive black hole binaries (SMBHBs) in non-circular orbits are prominent isolated sources of nanohertz gravitational waves (GWs) for the maturing pulsar timing array (PTA) experiments. The component black holes (BHs) in such SMBHBs can have non-negligible spin angular momentum like the primary BH in the most promising relativistic SMBHB candidate blazar OJ 287. We have developed a post-Newtonian accurate prescription to model PTA response to inspiral GWs from spinning SMBHBs while incorporating the dominant order general relativistic spin-orbit interactions. It turns out that the spin of the component BHs and the associated orbital precession can significantly affect the temporal evolution of the expected PTA signals induced by such SMBHBs. It will be crucial to take into account such effects while searching for continuous GWs from individual SMBHBs in PTA data sets. In this talk, I will present the theoretical framework for computing the ready-to-use PTA signals induced by spinning SMBHB sources and their salient features.