Light and magnetic fields from the edge of space and time

by Prof. Ivan Marti-Vidal (University of Valencia)

Wednesday, April 21, 2021 from 16:00 to 17:30 (Asia/Kolkata)
at Online through ZOOM Webinar ( Zoom link: https://zoom.us/j/97963259354?pwd=ZFZsa2xqWGJSZW5pUjZPNkNqeGlEZz09 )

Meeting ID: 979 6325 9354 Pass code: 04072020

Description

In April 2017, the Event Horizon Telescope (EHT) observed the near-horizon region around the black hole at the center of galaxy M87. The EHT image showed an asymmetric ring of light, produced by strong gravitational lensing and emission from relativistic plasma in the immediate vicinity of the black hole. Now, a polarization analysis of those EHT observations has revealed an ordered structure of the magnetic field near the event horizon, which has important implications for the dynamics of the plasma, on its way to the black-hole singularity, and for the production of the relativistic outflow (jet) seen at scales of thousands of light-years. In this colloquium, we will discuss about black-hole physics and the ground-breaking EHT results. 

References:

EHT Collaboration (2019), EHT Collaboration (2021)