Importance of the tidal heating in binary coalescence

by Sayak Datta (IUCCA )

Tuesday 28 Jan 2020, 16:00 → 18:00 Europe/Rome

Aula Conversi (Dipartimento di Fisica - Ed. G.Marconi)

Due to the presence of the horizon, black holes exchange energy
with the orbit, that backreacts on an inspiraling orbit. It is called
tidal heating. It can be used to test the presence of the horizon, and for
that, we introduced horizon parameter (H). Using H in LISA, presence of
the horizon can be tested. We compute the orbital dephasing and the
gravitational-wave signal emitted by a point particle in circular,
equatorial motion around a spinning supermassive object. We showed that
the absence of absorption by the central object can affect the
gravitational-wave signal dramatically. It allows us to put an upper bound
on the reflectivity of ECOs at the level of O(0.01)%.