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SUMMARY:Cosmology with Gravitational Lens Time Delays - Sherry Suyu (MPA)
DTSTART:20190530T150000Z
DTEND:20190530T160000Z
UID:TALK123160@talks.cam.ac.uk
CONTACT:28811
DESCRIPTION:Strong gravitational lenses with measured time delays between 
 the multiple\nimages can be used to determine the Hubble constant that set
 s the expansion\nrate of the Universe. Measuring the Hubble constant is cr
 ucial for inferring\nproperties of dark energy\, spatial curvature of the 
 Universe and neutrino\nphysics.  I will describe techniques for measuring 
 the Hubble constant from\nlensing with a realistic account of systematic u
 ncertainties.  A program\ninitiated to measure the Hubble constant to less
  than 3.5% in precision from strong\nlenses is in progress\, and I will pr
 esent the latest results and their\nimplications.  Search is underway to f
 ind new lenses in imaging surveys.  An\nexciting discovery of the first st
 rongly lensed supernova offered a rare\nopportunity to perform a true blin
 d test of our modeling techniques. I will\nshow the bright prospects of gr
 avitational lens time delays as an\nindependent and competitive cosmologic
 al probe.\n
LOCATION:Sackler Lecture Theatre\, IoA (tea at 3:30 pm)
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