Strong Gravity News & Events

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Charged regular black holes

N/A
Speaker
Nami Uchikata (IST Lisbon)
Event date
Venue
GAP room
Event type

Abstract: Regular black holes are black holes without spacetime singularities. One of the regular black hole models is composed of two distinct spacetimes separated by a thin shell. We have considered a regular black hole model, which is constructed of a de Sitter core within a thin shell and Reissner-Nordstrom spacetime outside the shell.

Tidal forces and mode resonances in compact binaries

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Speaker
Jan Steinhoff (IST)
Event date
Venue
GAP room
Event type
Abstract: Tidal interaction plays an important role in the inspiral of compact binaries involving neutron stars. In an adiabatic (vanishing frequency) approximation these are encode in the Love constants, which depend on the internal structure of the star. For neutron stars a general relativistic definition of the Love numbers is necessary and was only found in recent years by Hinderer, Damour&Nagar, and Poisson. In the present talk an extension to nonvanishing frequencies is discussed. The frequency-dependent Love number is in fact a propagator for an effective field theory description of a compact obje