The detection of GW170817 and the dawn of multi-messenger astronomy

Noviembre 14, 2017
De 3:00pm hasta 4:00pm

Department of theoretical physics room 201

Specialist level
Speaker: 
José Antonio Font
Institution: 
Universidad de Valencia
Location&Place: 

Department of theoretical physics room 201

Abstract: 
On August 17 2017, the LIGO/Virgo interferometers observed the first gravitational waves from a binary neutron star inspiral, GW170817. So far, gravitational waves had been "only" detected from binary black hole mergers - GW150914, GW151226, GW170104, and GW170814. The first of these detections confirmed a century-old prediction of Einstein’s theory of general relativity - the very existence of gravitational waves - and opened an entirely new way to study the cosmos. American scientists Rainer Weiss, Barry C. Barish, and Kip S. Thorne were awarded the Nobel Prize in Physics 2017 for the accomplishment. The last binary black hole event, GW170814, was jointly detected by LIGO and Virgo. The addition of the European detector Virgo to the network greatly enhanced the sky localization of GW170814. Contrary to the previous binary black hole signals, the spacetime ripples produced during the inspiral and merger of the two neutron stars in GW170817 were accompanied by flashes of light across the entire electromagnetic spectrum. The LIGO/Virgo network localized GW170817 within a sky region of 28 square degrees, which triggered an unprecedented multi-instrument observational campaign and opened the era of multi-messenger astronomy. This talk will discuss the efforts that have finally made possible the detection of gravitational waves, winding-up Einstein’s magnificent intellectual legacy on the centenary of the formulation of his theory of general relativity.