991 resultados para 169-1037A
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Includes index.
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Includes index.
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Includes index.
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"October 1973."
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Includes index.
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"January 1980."
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Includes index.
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Mode of access: Internet.
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[V.1.] Proceedings on Master's sale -- [v.2.] Decree of forclosure and sale -- [v.3.] Ancillary decree of foreclosure and sale.
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Trägerbände: Ms. Barth. 52; Ms. Barth. 66; Vorbesitzer: St. Peter Urach; Bartholomaeusstift Frankfurt am Main
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79 Briefe zwischen Max Horkheimer und Leo Löwenthal; 1 Brief von Leo Löwenthal an Everett C.Hughes, 31.05.1956; 1 Brief von Max Horkheimer an E. Henne, 06.02.1956; 1 Brief von Ralph W. Tyler an Leo Löwenthal, 06.02.1956;
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It has been proposed that dwarf irregular galaxies can be separated into two classes based on their formation mechanism; that they are the result of the collapse of a primordial gas cloud or that they are the product of condensation of gas in the tidal tails of interacting galaxies. Simulations of galaxy interactions indicate that one can differentiate between these two scenarios by the dark matter content, with a low dark matter content indicating a fossil tidal dwarf. The purpose of this dissertation was to explore the dark matter distribution of two dwarf irregular galaxies using optical and neutral atomic hydrogen data. For DDO 210, the method of mass-modelling was used to determine its dark matter. About 64% of the galaxy mass was calculated to be in the form of dark matter and hence it is unlikely to be a fossil tidal dwarf. The method of mass-modelling could not be used for DDO 169 as the galaxy shows evidence of being tidally disrupted and hence, has a disturbed velocity field. Instead, the suggestion that dark matter might be responsible for a pressure anomaly in DDO 169 was tested to determine its dark matter content. According to this method, a pressure anomaly does exist but without a concrete value for the scale-height, it is unclear whether the anomaly is due to the presence of dark matter. Hence one cannot say how much dark matter might actually be present in DDO 169. A rotation curve would be required to do this. ^