2 de septiembre de 2022 – 14:30 horas, aula del IAR

Expositor: Dr. Sheperd Doeleman – Universidad de Harvard, EHT.

Resumen: Black holes are cosmic objects so small and dense, that nothing, not even light can escape their gravitational pull.  Until recently, no one had ever seen what a black hole actually looked like.  Einstein’s theories predict that a distant observer should see a ring of light encircling the black hole, which forms when radiation emitted by infalling hot gas is lensed by the extreme gravity near the event horizon.  On April 10th, 2019, the EHT project reported success: using a global network of radio dishes we have imaged the 6.5 billion solar mass black hole in galaxy M87, and we have seen the predicted strong gravitational lensing that confirms the theory of General Relativity at the boundary of a black hole.  This was followed up on May 12th, 2022 by the first image of, SgrA*, the 4 million solar mass black hole in the center of the Milky way.  This talk will cover how this was accomplished, details of the first results, as well as future directions that will enable real-time black hole movies.