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…
Projective path to points at infinity in spherically symmetric spacetimes
Donato Bini, Giampiero Esposito
This paper proves that, in a four-dimensional spherically symmetric spacetime manifold, one can consider coordinate transformations expressed by fractional linear maps which give r…
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…