Workshop: Gravitational Waves

Date: 
11 December, 2017 - 14:30 - 18:00
Location: 
Aula Grassano

Workshop: Gravitational Waves.

Program:

 

14:30  Viviana Fafone (University of Rome "Tor Vergata")

Title: "Status and perspectives in GW astrophysics with ground based interferometers”

Abstract: I will discuss the state of the art of the GW detectors LIGO and Virgo, some of the results obtained so far and the evolution in the near-mid term of the world wide network of ground based interferometers.



15:30 Alessandro Nagar (Centro Fermi and INFN Turin)

Title: "Analytical waveform modeling for coalescing compact binaries"

Abstract: I will review the status of current analytical waveform modeling for coalescing binaries (black hole and  neutron star binaries) and its interface with numerical relativity simulations. In particular, I will focus on the current effort of the Virgo Theory Team (vTT) to complete the setup of models and analyses for GW170817. I will finally conclude with a personal view about what I think are the relevant future research directions to undertake both from the analytical and the numerical side.

 

16:30 Coffee break 

 

17:00 Paolo Pani (University of Rome “Sapienza”)

Title: "Searching for new physics at the horizon scale with gravitational waves”

Abstract: Gravitational wave (GW) astronomy allows for unprecedented tests of the nature of dark compact objects. In this context, I will discuss two signatures of new physics at the horizon scale: GW “echoes” in the postmerger ringdown phase of a binary coalescence, and finite-size effects of exotic compact objects that affect the inspiral pre merger phase. In the first case, the ringdown waveform of exotic ultracompact objects is initially identical to that of a black hole, and putative corrections at the horizon scale appear only at later times as a modulated and distorted train of echoes of the modes of vibration associated with the photon sphere. As for the second case, I will discuss the ability of present and future GW detectors to measure the tidal heating and tidal Love numbers of the binary components. All these effects display a universal logarithmic dependence on the location of the surface in the black-hole limit, providing a portal to test new physics at the horizon scale with current and future gravitational-wave detectors.