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PRODID:UW-Madison-Physics-Events
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UID:UW-Physics-Event-5087
DTSTART:20190509T203000Z
DTEND:20190509T221500Z
DTSTAMP:20260415T080458Z
LAST-MODIFIED:20190325T191951Z
LOCATION:4421 Sterling Hall\, Coffee and cookies 3:30 PM\, Talk begins
  3:45 PM
SUMMARY:Planets in a bottle: Exploring planetary atmospheres in the la
 b\, Astronomy Colloquium\, Sarah Horst\, The Johns Hopkins University
DESCRIPTION:From exoplanets\, with their surprising lack of spectral f
 eatures\, to Titan and its characteristic haze layer\, numerous planet
 ary atmospheres may possess photochemically produced particles of "haz
 e".  With few exceptions\, we lack strong observational constraints (i
 n situ or remote sensing) on the size\, shape\, density\, and composit
 ion of these particles.  Photochemical models\, which can generally ex
 plain the observed abundances of smaller\, gas phase molecules\, are n
 ot well suited for investigations of much larger\, solid phase particl
 es.  Laboratory investigations of haze formation in planetary atmosphe
 res therefore play a key role in improving our understanding of the fo
 rmation and composition of haze particles.  I will discuss a series of
  experiments aimed at improving our understanding of the physical and 
 chemical properties of planetary atmospheric hazes on Titan\, Pluto\, 
 super-Earths\, and mini-Neptunes.<br>
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URL:https://www.physics.wisc.edu/events/?id=5087
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