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Center for Astrophysics Research and Technologies Seminar Series Information


Events Calendar

Surprises from the Expansion of the Universe

Friday September 30, 2022
3:30 pm

 Presenter:  Dr. Adam Riess is a Bloomberg Distinguished Professor, the Thomas J. Barber Professor in Space Studies at Johns Hopkins with a joint appointment with the Space Telescope Science Institute.
He is an observational cosmologist and a member of the National Academy of Sciences. A past winner of a MacArthur Grant, the Breakthrough Prize in Physics, the Einstein Medal, the Shaw Prize and the Gruber Prize; Adam's observations of the accelerating expansion of the universe earned him the 2011 Nobel Prize in Physics. -- PASSWORD class
 Series:  Physics and Astronomy Colloquium
 Abstract:  The Hubble constant remains one of the most important parameters in the cosmological model, setting the size and age scales of the Universe. Present uncertainties in the cosmological model including the nature of dark energy, the properties of neutrinos and the scale of departures from flat geometry can be constrained by measurements of the Hubble constant made to higher precision than was possible with the first generations of Hubble Telescope instruments. A streamlined distance ladder constructed from infrared observations of Cepheids and type Ia supernovae with ruthless attention paid to systematics now provide 1.4% precision and offer the means to do much better. By steadily improving the precision and accuracy of the Hubble constant, we now see evidence for 5 sigma deviations from the standard model, referred to as LambdaCDM, and thus the exciting chance, if true, of discovering new fundamental physics such as exotic dark energy, a new relativistic particle, or a small curvature to name a few possibilities. I will review recent and expected progress, most recently based on measurements by the SH0ES Team from the Hubble Space Telescope and Gaia EDR3.
 Web Site:    https:/ / youtu.be/ S7-jBqjW6b8
 Host:  Kevin Cahill
 Location:  Zoom

Disability Notice If you need an auxiliary aid or service to attend any Department of Physics and Astronomy event, please contact the department (phone: 505 277-2616; email: physics@unm.edu) as far in advance as possible to ensure you are accommodated.