Brian Schmidt coauthored the High-Z Supernova Search Team's 1998 evidence for accelerating cosmic expansion. The analysis joined nearby Type Ia supernovae to a more distant sample to test the relation between luminosity distance and cosmological redshift.
Comparing multiple light curve fitting procedures helped test whether the inferred faintness depended on one calibration method. The combined observations favored an accelerating cosmological model with a positive cosmological constant.[ref]
Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant by Adam Riess and others. Author list and abstract: combined samples, alternative light-curve fits and cosmological constraints
Portrait of Brian Schmidt
. Tim Wetherell. CC BY-SA 3.0, via Wikimedia Commons. Source. Articles by others on the same topic
Brian Schmidt is an American astrophysicist known for his work in the fields of cosmology and the study of the accelerating expansion of the universe. He was awarded the Nobel Prize in Physics in 2011, sharing the prize with Saul Perlmutter and Adam Riess, for their discovery of the acceleration of the universe's expansion through observations of distant supernovae.