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SUMMARY:White dwarfs as tracers of evolved planetary systems - Dr Paula Iz
 quierdo (Warwick)
DTSTART:20251104T130000Z
DTEND:20251104T140000Z
UID:TALK237478@talks.cam.ac.uk
CONTACT:James Rogers
DESCRIPTION:The vast majority of all planet-hosting stars\, including the 
 Sun\, will eventually evolve into white dwarfs. During this evolution\, th
 e innermost planets will evaporate but asteroids and planets beyond a few 
 astronomical units will survive. The reduced dynamical stability of the ev
 olved planetary system can scatter these surviving bodies into the white d
 warf Roche radius where they are shredded by tidal forces. This debris can
  be detected through different signposts and studying these systems provid
 es extremely detailed insight into the bulk composition of extrasolar plan
 ets\, live tidal-disruption bodies and an additional tool to unveil orbiti
 ng planets. In this seminar\, I will highlight the chemical compositions o
 f the parent bodies derived by the\nheaviest metal-enriched white dwarfs o
 bserved so far by DESI. In addition\, I will present a toy model to estima
 te the contribution of planetary material to the significant hydrogen cont
 ained in many He-dominated white dwarfs.
LOCATION:Ryle seminar room + ONLINE - Details to be sent by email
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