Séminaire Gravitation - Giulia Cusin, Astrophysical background of gravitational waves: anisotropies, polarization and cross-correlations with cosmological observables.

Le groupe Gravitation organise le séminaire suivant le lundi 24 février à 11h, par Giulia Cusin, dans la salle 631B de l’APC.
 
Astrophysical background of gravitational waves: anisotropies, polarization and cross-correlations with cosmological observables. 
 
The astrophysical background of gravitational waves (AGWB) is composed by the incoherent superposition of gravitational wave signals emitted by a large number of resolved and unresolved astrophysical sources from the onset of stellar activity until today. I present a theoretical framework  to fully characterize the AGWB in terms of energy density anisotropies and polarization and I present the first numerical predictions for the angular power spectra of anisotropies in the LIGO/Virgo and  LISA frequency bands, and for cross-correlations with electromagnetic observables e.g. weak lensing and galaxy number counts.  I show that the anisotropies of the stochastic background contain additional information on sub-galactic processes, complementary to the isotropic background and individual mergers. I then illustrate and discuss the astrophysical implications of this study. 
 

Dates: 

Lundi, 24 février, 2020 - 11:00 to 12:30

Localisation / Location: 

APC

Salle / Local: 

631B
  • Séminaire

Nom/Prénom // Last name/First name: 

Giulia Cusin

Affiliation: 

Oxford

Equipe(s) organisatrice(s) / Organizing team(s): 

  • Gravitation

Pays / Country: 

UK