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5 Results
 

Building 10 Map

One of a Series: Physics Colloquium

Supercomputer Explorations of Galaxy Formation

April 20, 2017, 4 PM

Volker Springel
Heidelberg University

Host: Mark Vogelsberger

The Universe features a rather strange composition, with unknown dark matter and dark energy components dominating today's energy density. Early numerical simulations have played a pivotal role in demonstrating that this unexpected cosmological model gives rise to a remarkably successful theory for structure formation. Nowadays, hydrodynamical simulations have become our most important theoretical tool to study non-linear multi-scale dynamics in the baryonic sector, allowing us to follow how hydrogen and helium gases condense out in galaxies, form stars, and populate the predicted dark matter structures. However, we still struggle to understand the regulation of star formation, which appears rather inefficient on a global scale, defying simple theoretical expectations. In this talk, I will review some of the current results of galaxy formation simulations and discuss how they help us to identify and constrain the physics shaping galaxies and clusters of galaxies. I will also discuss the quest for high precision numerical predictions of the baryonic imprint on dark matter structures, which directly affects observational programs to constrain the physical nature of dark energy.

Building 10 Map

One of a Series: Physics Colloquium

New Views of the Universe

May 4, 2017, 4 PM

Dragan Huterer
University of Michigan

Host: Physics Graduate Student Council

I will discuss how progress in cosmology over the past decade has improved our understanding of dark matter, dark energy, and the physics of the early universe. I will particularly concentrate on the developments in mapping out the expansion rate of the universe and the growth of density fluctuations in order to better understand dark energy, and eventually identify the physics responsible for universe's accelerated expansion.

Building 10 Map

One of a Series: Physics Colloquium

Re-Thinking Astronomy and Physics Education: Lessons Learned from Two Decades of Experiments on College-Level Teaching and Learnin

May 11, 2017, 4 PM

Edward Prather
University of Arizona

Host: Matt Evans

Over the past two decades, members of the Center for Astronomy Education (CAE) have created a national STEM education research collaboration of faculty, post-docs, graduate and undergraduate students all working together to better understand and improve the teaching and learning of introductory astronomy and physics. Our multi-institutional and iterative education research model has successfully informed the development of several innovative active learning and assessment strategies. These research-validated classroom strategies have been used to significantly improve the discipline knowledge, critical reasoning and problem solving abilities, and attitudes of hundreds of thousands of learners in STEM classrooms. I will discuss the findings from two important research projects from this work, and unpack how these results inform future STEM education work on the creation of effective online-learning and addressing issues of inclusion and diversity in STEM.

Building 10 Map

One of a Series: Physics Colloquium

Nuclear Physics as Precision Science

May 4, 2017, 4 PM

Ulf-G. Meissner
Universität Bonn & Forschungszentrum Jülich

Host: Physics Graduate Student Council

Theoretical Nuclear Physics has entered a new era. Using the powerful machinery of chiral effective Lagrangians, the forces between two, three and four nucleons can now be calculated with unprecedented precision and with reliable uncertainties. Furthermore, Monte Carlo methods can be adopted to serve as a new and powerful approach to precisely solve nuclear structure and reactions. I will discuss the foundations of these new methods and provide a variety of intriguing examples. Variations of the fundamental constants of Nature can also be investigated and the consequences for the element generation in the Big Bang and in stars are considered. This sheds new light on our anthropic view of the Universe.

Building 10 Map

One of a Series: Physics Colloquium

Nuclear Physics as Precision Scienc

May 25, 2017, 4 PM

Ulf-G. Meissner
Universität Bonn & Forschungszentrum Jülich

Host: William Detmold

Theoretical Nuclear Physics has entered a new era. Using the powerful machinery of chiral effective Lagrangians, the forces between two, three and four nucleons can now be calculated with unprecedented precision and with reliable uncertainties. Furthermore, Monte Carlo methods can be adopted to serve as a new and powerful approach to precisely solve nuclear structure and reactions. I will discuss the foundations of these new methods and provide a variety of intriguing examples. Variations of the fundamental constants of Nature can also be investigated and the consequences for the element generation in the Big Bang and in stars are considered. This sheds new light on our anthropic view of the Universe.

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