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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-6171
DTSTART:20201029T203000Z
DTEND:20201029T220000Z
DTSTAMP:20260415T010440Z
LAST-MODIFIED:20201026T132544Z
LOCATION:Zoom meeting(see Abstract ) Coffee and tea 3:30pm\, Talk 3:45
 pm
SUMMARY:Illuminating the Chemistry of Planet Formation with X-ray Flar
 es\, Astronomy Colloquium\, isle Cleeves\, University of Virginia
DESCRIPTION:The chemistry of protoplanetary disks sets the initial com
 position of newly formed planets and may also regulate the efficiency 
 by which planets form. Disk chemical abundances typically evolve over 
 timescales spanning thousands if not millions of years. Consequently\,
  it was a surprise when ALMA observations taken over the course of a s
 ingle year showed significantly variable molecular emission in H13CO+ 
 relative to the otherwise constant thermal dust emission in the IM Lup
  protoplanetary disk. HCO+ is a known X-ray sensitive molecule\, and o
 ne possible explanation is that stellar activity is perturbing the che
 mical "steady state" of the disk. If confirmed\, simultaneous observat
 ions may provide a new tool to measure (and potentially map) fundament
 al disk parameters\, such as electron density\, as the light from X-ra
 y flares propagates across the disk.<br>
\n<br>
\nhtps://us02web.zoom.
 us/j/88513896776?pwd=Y1JtRE1KZllxWkFTamJBSGtGdm9yQT09<br>
\n
\nMeeting
  ID: 885 1389 6776
\nPasscode: 713070
\n
URL:https://www.physics.wisc.edu/events/?id=6171
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