The Sixth Gruber Cosmology Conference at Yale University

 Please register for the conference here. 

The 2025 Gruber Cosmology Prize will be streamed live on October 3 at https://yale.zoom.us/j/93406083567#success

The 2025 Gruber Cosmology Prize will be presented to

Ryan Cooke & Max Pettini

for bringing the light element abundances and Big Bang Nucleosynthesis (BBN) into the realm of precision cosmology. By finding and selecting the most pristine quasar absorption-line systems in the high-redshift Universe, unaltered by star formation, and by leveraging the capabilities of some of the largest ground-based telescopes, Cooke and Pettini obtained a one percent measurement of the primordial deuterium to hydrogen (D/H) ratio. This meticulous work has made possible a BBN-based determination of the baryon density of the Universe with precision comparable to that of the Cosmic Microwave Background determination, enabling important consistency tests of early-time physics between t = 1 s and t = 400,000 years.

In celebration of the 2025 prize, The Gruber Foundation and the Yale Departments of Astronomy and Physics will host a one-day conference on Friday, October 3 at Yale, from The conference will take place at Kline 14, 219 Prospect St, New Haven, CT.

Program

1:00-1:45pm Gwen Rudie (Carnegie Science):From Chemistry to Cosmology: How spectroscopy can deepen our understanding of galaxies and our Universe 

1:45-2:30pm Cara Giovanetti (UC Berkeley, Lawrence Berkeley National Lab): BBN for New Physics 

2:30-2:45pm Coffee Break

2:45-3:30pm Pratik Gandhi (Yale University): Nucleosynthesis and element production in the era of the first stars and galaxies

3:30-4:15pm Cora Dvorkin (Center for Astrophysics, Harvard University): The Universe as a Lab for Fundamental Physics

4:15 - 4:30pm Coffee Break

4:30-4:45pm 2025 Gruber Cosmology Prize Ceremony

4:45-5:30pm Ryan Cooke (Durham University) & Max Pettini (University of Cambridge): Precision Cosmology with the Lightest Elements