Speaker
Mike Engesser
(STScI)
Description
JWST affords us the opportunity to test our cosmological models and understanding of stellar physics by observing supernovae at high-redshift. Specifically, type Ia supernovae are understood to be “standardizable candles”, an assumption which underlies some of our best cosmological distance measurements. However, it is possible that globally evolving properties, such as metallicity, could impact SN Ia luminosity standardization, and thus bias cosmological measurements. Here we present the beginnings of the high-z SNe Ia sample, and a first look at trends in their characterization.