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SUMMARY:Debris Discs as Probes of Planetary Systems - Tim Pearce (Jena)
DTSTART:20221129T130000Z
DTEND:20221129T140000Z
UID:TALK183605@talks.cam.ac.uk
CONTACT:Dr Jessica Rigley
DESCRIPTION:We know little about the outermost planets in exoplanetary sys
 tems\, because current detection techniques are insensitive to moderate-ma
 ss planets on wide orbits. However\, insight can be gained by using debris
  discs (extrasolar equivalents of our Asteroid and Kuiper Belts) as indire
 ct probes of planetary systems. This approach has been widely applied over
  the past few decades\, allowing us to infer the presence and properties o
 f unseen planets from their gravitational influence on observed debris. No
 w\, with the advent of modern equipment such as JWST\, we are finally in t
 he era where direct detections of these long-predicted planets should be p
 ossible. In this talk I review the rich and exciting field of planet-debri
 s interactions\, outlining its historical evolution\, the diverse techniqu
 es for constraining planets from debris\, and how it is likely to develop 
 in future. I discuss what the approach teaches us about planet populations
 \, debris discs\, and planet formation and evolution mechanisms (including
  my own work)\, as well as the insights that we would gain from future det
 ections (or non-detections) of expected planets. The talk should be access
 ible to those without detailed knowledge of planetary system dynamics or d
 ebris-evolution mechanisms\; instead I aim to summarise what we can infer 
 about planets from debris observations\, as well as the strengths and limi
 tations of this approach.
LOCATION:Ryle seminar room + ONLINE - Details to be sent by email
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