Abstract :
Pulsar Timing Array (PTA) experiments have recently provided compelling evidence for a nanohertz gravitational-wave background (GWB) through precise timing of an ensemble of millisecond pulsars. While the most plausible origin of this background is the population of supermassive black hole binaries (SMBHBs) formed during galaxy mergers, alternative
cosmological sources remain strong contenders. Characterizing the detected GWB more precisely, determining its source(s), and detecting continuous gravitational waves (GWs) from individual SMBHBs are the next major milestones for these experiments. In this seminar, I will discuss our recent works and ongoing efforts towards these goals, paving the way for multi-messenger nanohertz GW astronomy. In particular, I will focus on (i) the development and application of efficient and accurate pipelines for
searching for continuous GWs in PTA data, (ii) efforts to build high-quality PTA datasets, and (iii) in-depth study of promising SMBHB candidates.
