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Modified Newtonian dynamics at all astrophysical scales
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dc.contributor.advisor | Zhao, Hongsheng | |
dc.contributor.author | Angus, Garry W. | |
dc.coverage.spatial | 131 | en |
dc.date.accessioned | 2008-09-19T13:38:45Z | |
dc.date.available | 2008-09-19T13:38:45Z | |
dc.date.issued | 2008-11-27 | |
dc.identifier.uri | https://hdl.handle.net/10023/530 | |
dc.description.abstract | In 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.extent | 2879798 bytes | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en | en |
dc.publisher | University of St Andrews | |
dc.subject | Galaxy dynamics | en |
dc.subject | Cosmology | en |
dc.subject | Alternative gravity | en |
dc.subject | MOND | en |
dc.subject | Dwarf galaxies | en |
dc.subject | CMB | en |
dc.subject | Cosmic microwave background | en |
dc.subject | Sterile neutrinos | en |
dc.subject | Clusters of galaxies | en |
dc.subject | Milgrom | en |
dc.subject | Modified dynamics | en |
dc.subject | Dark matter | en |
dc.subject.lcc | QB856.A6 | |
dc.subject.lcsh | Galactic dynamics | en |
dc.subject.lcsh | Dark matter(Astronomy) | en |
dc.subject.lcsh | Gravitation | en |
dc.subject.lcsh | Neutrinos | en |
dc.title | Modified Newtonian dynamics at all astrophysical scales | en |
dc.type | Thesis | en |
dc.type.qualificationlevel | Doctoral | en |
dc.type.qualificationname | PhD Doctor of Philosophy | en |
dc.publisher.institution | The University of St Andrews | en |
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