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ASTRONOMY COLLOQUIUM<br>The Milky Way: Simulations and Observations of Galactic Structure in the SDSS Volume

Thursday, October 31, 2013
4:00 AM
807 Dennison Building

Recent rapid progress in both observational surveys and simulation science has enabled a new era of direct comparison between the two.  In this talk, I will present a comparison between recent Sloan Digital Sky Survey (SDSS) Galactic studies and N –body simulations to aid in the interpretation of observed structures.  I will discuss both the origin of the Galactic thin/thick disk system and the contents of the Galactic halo by drawing comparisons to two high resolution simulations produced using GASOLINE (Wadsley et al., 2004).  I will focus on two key questions: (1) What is the plausibility of radial migration as a main driver for shaping the thick disk? and (2) How useful are Jeans equations in deriving properties of the Galactic potential within the SDSS volume? I will discuss several key findings, including my recent measurements of the Milky Way's dark matter axis ratio.

Sarah Loebman joined the Astronomy Department as a new fellow of the University of Michigan Society of Fellows. She graduated from the University of Washington at 2013, with scientific focus on Galactic structure, Milky Way dynamics, N-Body+SPH simulations of galaxies, galactic chemical evolution, & the scientific application of database technology.

Colloquia are generally preceded by tea and cookies at 3:30 in the Owl room (Dennison 845). For more information, please contact