Speaker: Roger Blandford (KIPAC, Stanford University)
Title: Electromagnetic Jets and the Black Hole Shadow in M87
Date (JST): Fri, Oct 18, 2019, 14:00 - 15:00
Place: Lecture Hall
Related File: 2426.pdf
Abstract: Recent, remarkable images made by the EHT collaboration exhibit a ring of emission, presumably orbiting a six billion solar mass black hole. The ring has been interpreted as gas torus, confining the jet and supported by the pressure of hot ions. An alternative interpretation of the ring is an extensive “ ergomagnetosphere" that connects mechanically to a much larger ``ejection disk’’ and that the powerful jets and the disk are mostly powered by black hole spin, not accretion. Implications this conjecture for observations of general active galactic nuclei and other sources of relativistic jets will be briefly discussed.