Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"Cassiopeia A"”.
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A 3-dimensional analysis of the Cassiopeia a supernova remnant.
… study of the nearby supernova remnant Cassiopeia A (Cas A). Easily resolvable supernova remnants such as Cas A provide a unique opportunity to test supernova explosion models. Additionally, we can observe key processes in the interstellar medium as the ejecta from the initial explosion …
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TeV-Gamma-Emission des Supernova-Überrestes Cassiopeia A : Erster Nachweis mit dem HEGRA-Cherenkov-Teleskop-System
… TeV-Gamma-Emission des Supernova-Überrestes Cassiopeia A nachgewiesen. Die Beobachtungen wurden in den Sommermonaten der Jahre 1997 bis 1999 mit einer Beobachtungszeit von 232 Stunden durchgeführt. Das Signal hat eine statistische Signifikanz von 5 Sigma, der Fluß von Cassiopeia A oberhalb …
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Disconnected interferometry at 81.5 MHz
… structure and behaviour of the supernova remnant Cassiopeia A at low frequencies. Much of the instrumentation used for this work already existed, but in a form unsuitable for measuring phase. The first section of the Thesis shows how these data collection and digital correlator systems could be …
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Imaging X-ray spectroscopy with micro-X and Chandra
… two investigations of the supernova remnant Cassiopeia A using the flagship X-ray observatory, Chandra. The first study combines the spatial resolution of the ACIS instrument with the spectral resolution of the dispersive HETG to investigate the evolution of ejecta knots. The second improves …
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The Development of a Small Scale Radio Astronomy Image Synthesis Array for Research in Radio Frequency Interference Mitigation
… thesis is a radio image of the supernova remnant Cassiopeia A. This thesis concludes with simulations of an RFI mitigation experiment that can be performed with the new array (pending certain improvements to the array).
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Determinations of the radii, redshifts, and atmospheric compositions of neutron stars from modeling their Chandra X-ray spectra
… observations of the point source in the Cassiopeia A supernova remnant (Cas A XPS), and the isolated neutron star RX J1856.5-3754. I apply models calculated with advanced versions of the ATM model atmosphere code developed by Madej and Joss for neutron-star atmospheres composed of …