BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-1304
DTSTART:20081014T203000Z
DURATION:PT1H0M0S
DTSTAMP:20260506T200026Z
LAST-MODIFIED:20081002T192615Z
LOCATION:6515 Sterling Hall
SUMMARY:Testing Models for Interstellar Dust\, Astronomy Colloquium\, 
 Bruce Draine\, Princeton University
DESCRIPTION:The basic properties of interstellar dust continue to be c
 ontroversial. We are quite sure that much of the dust mass is composed
  of amorphous silicates. There is wide agreement that interstellar dus
 t includes a substantial population of ultrasmall grains consisting of
  large PAH molecules. All authors agree that carbonaceous material con
 tributes an appreciable fraction of the overall grain mass. Beyond thi
 s\, there remains uncertainty over fundamental issues. For example\, g
 rain morphology -- is the overall dust mass dominated by grains that a
 re compact\, or by grains that are loose\, fluffy aggregates?&lt\;br&g
 t\;<br><br>
\nI will discuss some recent work on interstellar dust\, i
 ncluding:&lt\;br&gt\;<br><br>
\n(1) models vs observations of IR emiss
 ion from star-forming galaxies\;&lt\;br&gt\;<br><br>
\n(2) predicting 
 polarization of FIR/submm emission from interstellar dust\;&lt\;br&gt\
 ;<br><br>
\n(3) conflict between current interstellar dust models and 
 observations of interstellar dust entering the heliosphere.
URL:https://www.physics.wisc.edu/events/?id=1304
END:VEVENT
END:VCALENDAR