Twinkling Quasars Lensed by Galaxies Lensing Quasars

  • May 30, 2017, 2:00 pm
  • Paul Schechter, MIT
Nobody who has looked carefully at the two broad classes of stellar
mass estimates for galaxies will question the need for another method.
Quasars that are multiply imaged by galaxies twinkle as a result of
micro-lensing by the stars that comprise the galaxies.  We have used
this to estimate stellar masses for the lensing galaxies.  We are
limited by small number statistics.  We discuss at length the use of
the ongoing ATLAS and DES surveys (and the upcoming LSST survey) to
find new lenses, show some examples thereof, and describe the
associated “challenges.”