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SUMMARY:What is the origin of exozodiacal dust? - Jess Rigley
DTSTART:20200212T134500Z
DTEND:20200212T141500Z
UID:TALK136990@talks.cam.ac.uk
CONTACT:Catrina Diener
DESCRIPTION:Many stars show mid-infrared excesses in their SEDs which are 
 associated with warm dust in the habitable zone of the star. This is known
  as exozodiacal dust\, in analogy to the solar system's zodiacal cloud. Th
 e presence of even low levels of this dust will be problematic for future 
 attempts at detection and characterisation of exo-Earths. Therefore\, unde
 rstanding the origins of exozodiacal dust allows us to better target plane
 t detection missions. The origin of this dust is not well understood. I wi
 ll present a model for how this dust could be produced in a cold planetesi
 mal belt and transported to the inner regions of the system by Poynting-Ro
 bertson drag. This model is applied to results from the HOSTS survey\, whi
 ch used the Large Binocular Telescope Interferometer to search for exozodi
 acal dust around nearby stars.
LOCATION:Sackler Lecture Theatre\, IoA
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