Cosmology and Stellar Physics with Strong Lensing

by Sherry Suyu

Max Planck Institute for Astrophysics & Technical University of Munich
at Physics Colloquium

Mon, 16 May 2022, 16:10


Strongly lensed supernovae (SNe) are emerging as a new probe of cosmology and SN progenitors. The time delays between the multiple images of a lensed SN can be used to determine the Hubble constant (H0) that sets the expansion rate of the Universe. An independent determination of H0 is important to ascertain the possible need of new physics beyond the standard cosmological model, given the tension in current H0 measurements. The first strongly lensed SN with multiple spatially-resolved SN images, named SN Refsdal, was a spectacular event providing an excellent opportunity to measure H0. While strongly lensed SNe are very rare with currently only 3 known systems, future surveys, particularly the Rubin Observatory Legacy Survey of Space and Time, are expected to yield hundreds of such exciting events. I present a new program aimed to find and study lensed SNe for cosmology and stellar physics.

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Created on 09-05-2022 by Kats, Yevgeny (katsye)
Updaded on 10-05-2022 by Kats, Yevgeny (katsye)