Dillon Brout
Tuesday September 24th, 2024
4:00pm Eastern
Marlar Lounge 37-252/37-272 and via Zoom
"Professor Dillon Brout is a cosmologist at Boston University, specializing in tying together cosmological distance and velocity measurements to the fundamental properties of the universe such as dark matter and dark energy. He has a leading role in many experiments such as SHOES, Pantheon+, DES, DESI, and DECAT."
- Lina Necib
Experimental status of the Standard Cosmological Model with Type Ia Supernovae
This talk will cover the recent cosmological analyses of Type Ia Supernovae (SNeIa) from the Pantheon+ & SH0ES collaborations and the Dark Energy Survey Supernova Program that tell two important stories. These SNIa provide exceptionally robust constraints of cosmic acceleration, the dominant energy density components of the universe, and potential modifications to Lambda Cold Dark Matter (LCDM) model, especially when combined with other leading probes such as Baryon Acoustic Oscillations constraints. Meanwhile, I will detail how SH0ES cosmic distance ladder measurement of the Hubble Constant is now even more robust to systematic uncertainties and has crossed the significant threshold of 5-sigma discrepancy when compared to the cosmic microwave background (Planck) under the assumption of a LCDM model.