A continuación el resumen:
One of the most interesting sources of gravitational waves is the inspiral of compact objects on to a massive black hole (MBH), commonly referred to as an extreme-mass ratio inspiral. The small object, typically a stellar black hole, emits significant amounts of GW along each orbit in the detector bandwidth. On the other hand, recent observations of the Galactic center revealed a dearth of giant stars inside the inner parsec relative to the numbers theoretically expected for a fully relaxed stellar cusp. The possibility of unrelaxed nuclei (or, equivalently, with no or only a very shallow cusp) adds substantial uncertainty to the estimates. I show that under quite generic initial conditions, the time required for the growth of a relaxed, mass segregated stellar cusp is shorter than a Hubble time for MBHs with masses<~ 5 x 10^6 Msun. Also, I prove that if the MBH is of Kerr nature and not Schwarzschild, the EMRI rates are significantly enhanced.
El encuentro tendrá lugar en la sala de seminarios del tercer piso del DFI, a las 12:45. Como siempre, habrán pizzas y bebestibles. Se agradece confirmar asistencia.
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