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SUMMARY:An observational perspective on white dwarf planetary systems - La
 ura Rogers (IoA)
DTSTART:20241203T130000Z
DTEND:20241203T140000Z
UID:TALK225226@talks.cam.ac.uk
CONTACT:Dr Dolev Bashi
DESCRIPTION:Exoplanets are ubiquitous across the Milky Way\, but only a ha
 ndful of planets have been discovered around white dwarf stars. Although s
 o few in tact planets have been found\, there is extensive evidence for th
 e survival of planetary material to the white dwarf phase. At least 30% of
  white dwarfs are observed with signatures of swallowed exoplanets in thei
 r atmospheres\, and a fraction of these show evidence for circumstellar de
 bris.  From these 'polluted' white dwarfs\, we can uniquely infer the bulk
  composition of the exoplanetary parent body that was accreted. This talk 
 will provide an observational overview of these enigmatic systems\, from t
 he outer circumstellar regions to the white dwarf atmospheres. How does th
 is exoplanetary material ultimately end up in the atmosphere of these whit
 e dwarfs? What is the composition of the planetary material that has pollu
 ted the white dwarfs? What can this composition tell us about exoplanetary
  material and geological processes in exoplanetary systems? \n
LOCATION:Ryle seminar room + ONLINE - Details to be sent by email
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