Dillion Brout, Havard University: Mapping 12 Billion Years of Cosmic History in the Coming Golden Era of Type Ia Supervovae

  • Starts: 4:00 pm on Wednesday, February 15, 2023
  • Ends: 5:00 pm on Wednesday, February 15, 2023
Type Ia Supernovae (SN) are a central pillar of the “Standard Model of Cosmology” - Lambda Cold Dark Matter (LCDM), but they also uniquely elucidate gaps in the theory. I will detail leaps of progress in SN cosmology culminating in the recent Dark Energy Survey, Pantheon+, and SH0ES cosmological analyses that tell distinct stories. While these SN datasets place strong constraints on dark matter, dark energy and solidify LCDM, our SH0ES constraints of the local value of the Hubble Constant (the current expansion rate of the universe) may be casting LCDM in doubt. I will detail the robust systematic uncertainties that have built confidence in these measurements and that also pave the path for future surveys from the Vera Rubin Observatory's LSST and the Nancy Grace Roman Space Telescope. With an imminent gold rush of more than 1 million SN across the entire night sky covering more than 12 billion years of cosmic history, future SN surveys will perform new tests of general relativity, constraints on the growth of structure, and search for evolving dark energy to unprecedented levels and to better precision than ever anticipated.
CAS 502
Dillion Brout
Harvard & Smithsonian Center for Astrophysics
Martin Schmaltz