Colloque APC du professeur Smoot “Reinterpreting Low Frequency LIGO/Virgo Events as Gravitationally-Lensed Magnified Stellar-Mass Black Hole Mergers at Cosmological Distances”

Le professeur George Smoot (Université Paris Diderot, Hong Kong University of Science and Technology, Nazarbayev University, University of California) donnera un colloque intitulé “Reinterpreting Low Frequency LIGO/Virgo Events as Gravitationally-Lensed Magnified Stellar-Mass Black Hole Mergers at Cosmological Distances” (voir ci-dessous), dans l’amphithéâtre Pierre Gilles de Gennes à 11h le vendredi 6 Juillet.

 

 

Title: Reinterpreting Low Frequency LIGO/Virgo Events as Gravitationally-Lensed Magnified Stellar-Mass Black Hole Mergers at Cosmological Distances 
Abstract: I will be presenting a model that indicates that the apparent high-mass binary black hole mergers observed by LIGO/Virgo are actually lower mass black holes at higher redshift that have been highly magnified by gravitational lensing. In principle about half of the early events observed by LIGO/Virgo will be highly magnified by gravitational lensing and come from the range 0.5 < z < 2 rather than the z ~0.1 that they have been interpreted without taking lensing into account.