dc.contributor.advisor |
Butler, Malcolm |
|
dc.creator |
MacInnis, David R. (David Robert), 1977- |
|
dc.date.accessioned |
2011-05-09T12:32:04Z |
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dc.date.available |
2011-05-09T12:32:04Z |
|
dc.date.issued |
2004 |
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dc.identifier.other |
QB464.2 M33 2004 |
|
dc.identifier.uri |
http://library2.smu.ca/xmlui/handle/01/22433 |
|
dc.description |
vii, 79 leaves ; 28 cm. |
|
dc.description |
Includes abstract. |
|
dc.description |
Includes bibliographical references (leaves 75-77). |
|
dc.description.abstract |
MacFadyen & Woosley (1999) have studied two models of a hypernova, where a hyper-accreting disk is created in the core of a star. Their code requires an accurate model of local energy loss given by neutrino emission. An emissivity of 3.5×10[superscript 34] ergs cm[superscript -3] s[superscript -1] can be calculated using conservation laws of an accretion disk around a black hole. MacFadyen & Woosley (1999) used 9×10[ superscript 34] ergs cm[superscript -3] s[superscript -1] in their models. In particular, in this thesis, I analyze the contribution of the photo neutrino process to the emissivity. For a temperature of 10[superscript 10] K, a density of 10[superscript 9] g/cm[superscript 3], and a chemical potential of 2.02×10[superscript 7] eV, emissivities of (8.7 +/- 0.1)×10[superscript 21] and (7.0 +/- 0.2)×10[superscript 21] ergs cm[superscript -3] sec[superscript -1] are found. Rates of (8.6 +/- 0.1)×10[superscript 26] and (7.3 +/- 0.2)×10[superscript 26] cm[superscript -3] sec[superscript -1] are also found with average neutrinos energies of (6.2 +/- 0.2) and (6.0. +/- 0.3) MeV. The calculation of the photo neutrino production process is a more robust calculation than seen in previous work with the use of the complete scatting amplitude, and the use of Monte Carlo integration methods. |
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dc.description.provenance |
Made available in DSpace on 2011-05-09T12:32:04Z (GMT). No. of bitstreams: 0 |
en |
dc.language.iso |
en |
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dc.publisher |
Halifax, N.S. : Saint Mary's University |
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dc.subject.lcc |
QB464.2 |
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dc.subject.lcsh |
Neutrino astrophysics |
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dc.subject.lcsh |
Stars -- Evolution |
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dc.subject.lcsh |
Neutrinos |
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dc.title |
Neutrino emission by the photo production process in a hyper-accretion disk |
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dc.type |
Text |
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thesis.degree.name |
Master of Science in Astronomy |
|
thesis.degree.level |
Masters |
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thesis.degree.discipline |
Astronomy and Physics |
|
thesis.degree.grantor |
Saint Mary's University (Halifax, N.S.) |
|