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dc.contributor.advisorIvezic, Zeljkoen_US
dc.contributor.authorLoebman, Sarah Roseen_US
dc.date.accessioned2013-11-14T20:51:24Z
dc.date.available2013-11-14T20:51:24Z
dc.date.issued2013-11-14
dc.date.submitted2013en_US
dc.identifier.otherLoebman_washington_0250E_12363.pdfen_US
dc.identifier.urihttp://hdl.handle.net/1773/24097
dc.descriptionThesis (Ph.D.)--University of Washington, 2013en_US
dc.description.abstractIn this thesis, I present a comparison between recent Sloan Digital Sky Survey (SDSS) Galactic studies and N-body simulations to aid in the interpretation of observed structural features. I investigate 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. My aim is twofold: (1) to assess the plausibility of radial migration as a main driver for shaping the thick disk, and (2) to evaluate via Jeans equations properties of the Galactic potential within the SDSS volume. I arrive as several key findings: 1. Radial migration can produce on a global scale a physically reasonable thin/thick disk system in an N-body simulation. 2. Secular evolution via radial migration could be the source of spatial, chemical and kinematic disk trends observed in the solar cylinder by SDSS. 3. Jeans equations can meaningfully recover mean accelerations from a non steady-state, non axisymmetric cosmologically derived N-body simulation. 4. The morphology of the acceleration maps generated using Jeans equations applied to SDSS data is consistent with the presence of dark matter and inconsistent with a baryon only model of the Milky Way. 5. An analytic technique utilizing Jeans equations can meaningfully recover an N-body simulation's mean dark matter axis ratio. 6. The same analytic technique applied to SDSS Galactic halo data indicates the Milky Way dark matter axis ratio within the SDSS volume is qDM=0.47 ± 0.14. Breakthroughs such as these were enabled by recent rapid progress in both observational surveys and simulation science. This thesis demonstrates the emergent and informative value of direct comparison between the two.en_US
dc.format.mimetypeapplication/pdfen_US
dc.language.isoen_USen_US
dc.rightsCopyright is held by the individual authors.en_US
dc.subjectGalactic Structure; N-body Simulations; SDSS; Stellar Halo; Survey Science; Thin & Thick Disken_US
dc.subject.otherAstronomyen_US
dc.subject.otherastronomyen_US
dc.titleThe Milky Way in SDSS and in N-body Modelsen_US
dc.typeThesisen_US
dc.embargo.termsNo embargoen_US


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