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dc.contributor.advisorZhao, Hongsheng
dc.contributor.authorAngus, Garry W.
dc.coverage.spatial131en
dc.date.accessioned2008-09-19T13:38:45Z
dc.date.available2008-09-19T13:38:45Z
dc.date.issued2008-11-27
dc.identifier.urihttps://hdl.handle.net/10023/530
dc.description.abstractIn this thesis I test the modified Newtonian dynamics as an alternative to the cold dark matter hypothesis. In the Milky Way, I show that the dynamics of the dwarf galaxies are well described by the paradigm and I confirm its distant low surface brightness globular clusters provide a strong test, for which I make predictions. Through analysis of a sample of 26 X-ray bright galaxy groups and clusters I demonstrate that the three active neutrinos and their anti-particles are insufficient to reconcile modified Newtonian dynamics with the observed temperatures of the X-ray emitting gas, nor with weak-lensing measurements, in particular for the bullet cluster. To this end, I propose an 11eV sterile neutrino to serendipitously resolve the residual mass problem in X-ray bright groups and clusters, as well as matching the angular power spectrum of the Cosmic Microwave Background. With this in mind, I show that the large collision velocity of the bullet cluster and the high number of colliding clusters is more naturally reproduced in MOND than in standard dynamics.en
dc.format.extent2879798 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherUniversity of St Andrews
dc.subjectGalaxy dynamicsen
dc.subjectCosmologyen
dc.subjectAlternative gravityen
dc.subjectMONDen
dc.subjectDwarf galaxiesen
dc.subjectCMBen
dc.subjectCosmic microwave backgrounden
dc.subjectSterile neutrinosen
dc.subjectClusters of galaxiesen
dc.subjectMilgromen
dc.subjectModified dynamicsen
dc.subjectDark matteren
dc.subject.lccQB856.A6
dc.subject.lcshGalactic dynamicsen
dc.subject.lcshDark matter(Astronomy)en
dc.subject.lcshGravitationen
dc.subject.lcshNeutrinosen
dc.titleModified Newtonian dynamics at all astrophysical scalesen
dc.typeThesisen
dc.type.qualificationlevelDoctoralen
dc.type.qualificationnamePhD Doctor of Philosophyen
dc.publisher.institutionThe University of St Andrewsen


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