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SUMMARY:How to measure the spin of a black hole - Prof. Christopher Reynol
 ds\, Institute of Astronomy\, University of Cambridge
DTSTART:20201118T190000Z
DTEND:20201118T203000Z
UID:TALK152311@talks.cam.ac.uk
CONTACT:96343
DESCRIPTION:As with all astronomical objects\, black holes rotate.  Black 
 hole spin is an important property to quantify - the spin of a black hole 
 give insights into how it formed\, and the rotational energy of a black ho
 le can be tapped to drive (for example) the spectacular relativistic jets 
 that we often see from such systems.  But how do you measure the rotation 
 rate of a perfectly round and perfectly black sphere?  Here\, I shall desc
 ribe the subtle influences that black hole spin has on its surroundings an
 d how we have turned that understanding into quantitative tools for measur
 ing black hole spin.  I will then present results on both the supermassive
  black holes found in galactic centres and the stellar-mass black holes th
 at litter our galaxy
LOCATION:https://timeout.srcf.net/oes22-ors-efn &amp\; https://youtu.be/Mp
 fIqW0foJQ
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