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American University of Beirut Physics Department Invites you to a presentation entitled Burning Questions in Stellar Evolution By Dr. Ghina Mahmoud-Halabi Physics Dept., AUB Abstract The theory of stellar evolution allows us to understand the structure of stars and the origin of chemical elements in the universe. The theory relies on computer simulations which implement the fundamental laws of physics that we know in order to study the extreme environments which are encountered in stars where elements are created. Many of the observed abundance features in stars have been successfully explained by stellar models, which confirms that we understand a lot of details in several aspects of stellar evolution. However, there are still a lot of observational features that our standard models cannot explain, and thus challenge our understanding of the underlying physics. I will show some of these observed discrepancies, the questions they raise concerning related fundamental physical processes, and present a non-standard solution that may help resolve this conflict. Date: Thursday, March 5, 2015 Time: 5:00 p.m. Place: Emile Bustani for Physics, Rm. 333