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dc.contributor.advisorHongSheng, Zhao
dc.contributor.authorXufen, Wu
dc.description.abstractGalaxies are natural laboratories for testing fundamental physics on the nature of the dark matter. MOdified Newtonian Dynamics (MOND) has been tested for over 20 years on small and large scales. While there are several versions of how MOND extrapolates to the large scales, and these versions are not yet fully successful, the original Bekenstein-Milgrom version of MOND is fully predictive and works very well on galaxy scales. However, little work has been done to explore this theory beyond fitting the rotation curves and Tully-Fisher relation of isolated disc galaxies. So far little is known of MONDian elliptical galaxies accelerating in any galaxy cluster. A defining feature of MOND is that internal dynamics of the galaxy depends on the overall acceleration of the galaxy. The existence of cuspy triaxial equilibria for elliptical galaxies is the minimal requirement to MOND. With the PhD project here, I constructed and then further studied the evolution and stability of gravitationally bound systems resembling like cuspy elliptical galaxies, both in isolation and when embedded in a uniform external field. I also studied the escape speeds from spiral galaxies, in particular by comparing the potentials of the Milky Way Galaxy in the Cold Dark Matter (CDM) and MOND frameworks.en_US
dc.publisherUniversity of St Andrews
dc.relationWu, X., Famaey, B., Gentile, G., Perets, H., & Zhao, H. 2008, MNRAS, 386, 2199, 0803.0977en_US
dc.relationWu, X., Zhao, H., Famaey, B., Gentile, G., Tiret, O., Combes, F., Angus, G. W., & Robin, A. C. 2007, ApJ, 665, L101, 0706.3703en_US
dc.relationWu, X., Zhao, H., Wang, Y., Llinares, C., & Knebe, A. 2009, MNRAS, 396, 109, 0904.1425en_US
dc.relationWu, X.; Zhao, H.; Famaey, B., 2010, JCAP, 06, 010Wen_US
dc.rightsCreative Commons Attribution-NonCommercial 3.0 Unported
dc.subjectGalaxies : kinematics and dynamicsen_US
dc.subjectMethods : N-body simulationsen_US
dc.subjectModified gravityen_US
dc.subject.lcshGalactic dynamics--Mathematical modelsen_US
dc.titleNumerical modeling of modified Newtonian dynamics in galaxies : testing the external field effectsen_US
dc.contributor.sponsorScottish Universities Physics Alliance (SUPA)en_US
dc.type.qualificationnamePhD Doctor of Philosophyen_US
dc.publisher.institutionThe University of St Andrewsen_US
dc.publisher.departmentSchool of Physics and Astronomyen_US

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