This is a talk held during the regular colloquium series (usually Tuesdays at 4pm).

It’s All about the Galaxies: How the Circumgalactic Medium Informs How Today’s Galaxies Formed

Tuesday, April 17, 2018 - 1:00pm
Dr. Benjamin Oppenheimer (Colorado)

The circumgalactic medium (CGM) not only holds the majority of a galactic halo’s baryons, but it is an essential piece of the puzzle for the understanding of how galaxies form and evolve.  I will divide my talk into three portions, and use hydrodynamic simulations to help address central question

The Ages of (the Oldest) Stars

Tuesday, February 20, 2018 - 1:00pm
Prof. Márcio Catelan (Católica)

Deriving accurate ages of stars is one of the most important, if elusive, goals of modern-day astrophysics. In this talk, I will review some of the techniques that have been used to infer such ages, with emphasis on the oldest stars.


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