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Wednesday 18 November 2020, 19:00-20:30
How to measure the spin of a black hole
- đ¤ Speaker: Prof. Christopher Reynolds, Institute of Astronomy, University of Cambridge
- đ Date & Time: Wednesday 18 November 2020, 19:00 - 20:30
- đ Venue: https://timeout.srcf.net/oes22-ors-efn & https://youtu.be/MpfIqW0foJQ
Abstract
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 hole 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 describe the subtle influences that black hole spin has on its surroundings and how we have turned that understanding into quantitative tools for measuring black hole spin. I will then present results on both the supermassive black holes found in galactic centres and the stellar-mass black holes that litter our galaxy
Series This talk is part of the Cambridge University Physics Society series.
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- https://timeout.srcf.net/oes22-ors-efn & https://youtu.be/MpfIqW0foJQ
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