Conveners
Astrophysical black holes: theory and observations
- Andrea Maselli
Astrophysical black holes: theory and observations
- Andrea Maselli
Astrophysical black holes: theory and observations
- Andrea Maselli
Astrophysical black holes: theory and observations
- Andrea Maselli
Description
he goal of these lectures is to introduce the students to the formalism of relativistic perturbation theory. We will study in particular the linear response of a BH to an external perturbation, and identify the various features of the emitted gravitational wave signals, focusing on the Quasi Normal Modes (QNMs), the black hole characteristic oscillation frequencies, and on their spectrum. We will investigate the connection between QNMs and null geodesics, and introduce different mathematical techniques used to compute their actual values. Finally, we will link QNMs to astrophysical observations, and study how they can be used to test pillars of Einstein theory, as the uniqueness of the Kerr metric.
