4 papers
Poincaré asymptotic expansion in black hole theory
Giampiero Esposito, Marco Refuto
In studying the dynamics of fields in black hole theory, the method of separation of variables makes it possible to isolate the radial part of the full solution in many important p…
Bekenstein-Hawking temperature from the Schwarzian
Donato Bini, Giampiero Esposito
Hawking's original derivation of particle creation by black holes in Schwarzschild spacetime exploits, among various concepts, the exponential dependence on the retarded time varia…
Nariai spacetime: orbits, scalar self force and Poynting-Robertson-like external force
Donato Bini, Giampiero Esposito
After studying properties of the Nariai solution, including its geodesics, in spherical and de Sitter coordinates, two kinds of accelerated motion are investigated in detail: eithe…
Homogeneous projective coordinates for the Bondi-Metzner-Sachs group
Giampiero Esposito, Giuseppe Filiberto Vitale
This paper studies the Bondi-Metzner-Sachs group in homogeneous projective coordinates, because it is then possible to write all transformations of such a group in a manifestly lin…