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SPH Simulations of Spiral Galaxy Interarm Structure

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dc.contributor.advisor Koda, Jin en_US
dc.contributor.author Wilhelm, Joern en_US
dc.contributor.other Department of Physics en_US
dc.date.accessioned 2012-05-15T18:07:21Z
dc.date.available 2012-05-15T18:07:21Z
dc.date.issued 1-Aug-10 en_US
dc.date.submitted Aug-10 en_US
dc.identifier Wilhelm_grad.sunysb_0771M_10254.pdf en_US
dc.identifier.uri http://hdl.handle.net/1951/55669
dc.description.abstract This work investigates the growth of substructures in spiral galaxies using Smoothed Particle Hydrodynamics(SPH) simulations. The impact of varying spiral arm potentials, gas temperatures and numerical resolutions onto interarm features, observed as feathering, is studied and compared to predictions made by the K-H instability model by Wada and Koda(2004) and the clump shearing model by Dobbs and Bonnell(2006). They are also compared to a recent Archival HST survey of Spiral Galaxy Feathering. The interarm featuresseen in SPH and relative pressure SPH(rpSPH) simulations, are found to be overall similar to observed feathers. High temperatures decreases velocity shear in the spiral arm shock regions and interarm structures are smoothed out entirely. Higher spiral arm potential strength increases velocity shear and the amount of interarm structures. While higher resolution is found to increase their visibility, the intrinsic interarm structures seem hardly affected. The effect of gas temperature and spiral arm potential strength variations onto gaseous interarm structure is found to be consistent with both theoretical models. An increase of interarm structure at low resolution as anticipatedin the clump shearing model is not observed. en_US
dc.description.sponsorship Stony Brook University Libraries. SBU Graduate School in Department of Physics. Lawrence Martin (Dean of Graduate School). en_US
dc.format Electronic Resource en_US
dc.language.iso en_US en_US
dc.publisher The Graduate School, Stony Brook University: Stony Brook, NY. en_US
dc.subject.lcsh Physics, Astronomy and Astrophysics en_US
dc.subject.other galaxies:spiral, interarm structure en_US
dc.title SPH Simulations of Spiral Galaxy Interarm Structure en_US
dc.type Thesis en_US
dc.description.advisor Advisor(s): Jin Koda. Committee Member(s): Michael A. Zingale; Harold J. Metcalf. en_US
dc.mimetype Application/PDF en_US

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