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SUMMARY:Using polluted white dwarfs to understand the bulk composition of 
 exo-planetary material - Laura Rogers
DTSTART:20211110T131500Z
DTEND:20211110T134500Z
UID:TALK165751@talks.cam.ac.uk
CONTACT:Francisco Paz-C
DESCRIPTION:Exoplanets are ubiquitous in the Milky Way across a wide varie
 ty of spectral types\, including white dwarfs. At least 30% of white dwarf
 s are observed with signatures of swallowed exoplanetary material in their
  atmospheres. From these 'polluted' white dwarfs we infer the bulk composi
 tion of the parent body that was accreted. With over 1000 known polluted w
 hite dwarfs we can make powerful conclusions about exoplanetary compositio
 n and geology. We present VLT/X-shooter and KECK/HIRES observations of 7 '
 heavily' polluted white dwarf systems. What is the composition of the plan
 etary material that has 'polluted' the white dwarfs? What can the composit
 ion tell us about exoplanetary material and geological processes in exopla
 netary systems? 
LOCATION:The Hoyle Lecture Theatre + Zoom 
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