Pani, P. (2012), "Applications of black hole perturbation theory From the gauge/string
duality to high-energy astrophysics", EUROPEAN PHYSICAL JOURNAL PLUS, 127, 6.
Abstract: Black holes (BHs) have many faces. Within the gauge/string duality they
provide useful insights on strongly coupled quantum field theories and
on quantum gravity. Furthermore, probing the strong curvature regime of
any gravity theory, BHs carry the imprint of possible strong curvature
corrections to General Relativity. Finally, beside their unique
theoretical properties, compelling experimental evidence suggests that
astrophysical BHs are very common objects in the universe. Here we
discuss some applications of BH perturbation theory in various contexts.
As applications in theoretical physics, we study perturbations of
dilatonic BHs in Einstein-Maxwell theory and the holographic properties
of the dual field theory via the Anti de Sitter/Condensed Matter
duality. As applications in astrophysics, we discuss how the
characteristic oscillations of BHs in string-inspired theories of
gravity can provide observable signatures of deviations from Einstein's
theory. We study two well-motivated effective theories: Dynamical
Chern-Simons gravity and Einstein-Dilatonic-Gauss-Bonnet gravity. We
conclude by discussing the BH paradigm. Motivated by the lack of a
definitive answer on the existence of astrophysical BHs, we study some
viable alternatives, generically called ``BH mimickers''. We focus on
two representative cases: static thin-shell gravastars and superspinars,
discussing their stability, gravitational-wave signature and viability
as astrophysical objects.
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