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SEQUENCE:0
UID:UW-Physics-Event-6326
DTSTART:20210218T213000Z
DTEND:20210218T230000Z
DTSTAMP:20260415T023602Z
LAST-MODIFIED:20210205T142914Z
LOCATION:Zoom meeting(see Abstract ) Coffee and tea 3:30pm\, Talk 3:45
 pm
SUMMARY:Looking at the Universe through gravitational lenses\, Astrono
 my Colloquium\, Lindsay King\, University of Texas-Dallas
DESCRIPTION:Massive objects distort space-time\, acting as gravitation
 al lenses and distorting light bundles traveling to us from distant so
 urces. Distinctive lensing signatures\, including multiple or slightly
  stretched images of distant galaxies\, are seen on the electromagneti
 c (EM) sky. Most of the matter in the Universe is dark\; importantly\,
  these lensing signatures allow us to map and weigh matter in massive 
 objects\, irrespective of whether it is luminous or dark. We start wit
 h an overview of the principles of lensing\, some of the signatures se
 en on the EM sky on different scales in the Universe\, and some of the
  conclusions that resulted. <br>
\n<br>
\nOne example that we will dis
 cuss is our investigation of the dark and luminous matter in a rare an
 d extremely energetic collision between two giant clusters of galaxies
 \, using lensing and other astrophysical data.  <br>
\n<br>
\nTheoreti
 cal work has shown that gravitational waves (GW) are also gravitationa
 lly lensed. We briefly describe the expected impact of lensing on the 
 GW sky that will be seen with the future LISA space-based detector\, a
 nd our current research on this topic. <br>
\nWeb Link:<br>
\nhttps://
 uwmadison.zoom.us/j/88513896776?pwd=Y1JtRE1KZllxWkFTamJBSGtGdm9yQT09<b
 r>
\n
URL:https://www.physics.wisc.edu/events/?id=6326
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