New Advances with Type Ia Supernovae To Measure The Expansion of the Universe

26 mai 2021, 18:10
40m

Orateur

Prof. Dan Scolnic (Duke University)

Description

Type Ia Supernovae (SNe Ia) are critical tools for measuring the current expansion rate of the universe, described by the Hubble Constant, and the accelerating expansion, due to a mysterious dark energy’.  As measurements from SNe Ia continue to be important and exciting, there has been widespread interest on strengths and limitations of using SNe Ia in analyses.  Here, I review the latest cosmological results using SNe Ia as well as systematic uncertainties and needed improvements for future analyses.  I present a new key insight on the physics of SNe that addresses some of the most confounding issues of the last decade. I discuss the state of theHubble Constant Tension’ and upcoming measurements of the local cosmic distance ladder. I then will transition to future experiments like LSST and WFIRST, and show forecasts of the amazing constraints on cosmological parameters with 100x the statistics of current samples.

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