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.