Supernovae explosions induced by pair production instability
<p>Stars with a core mass greater than about 30 M<sub>⊙</sub> become dynamically unstable due to electron-positron pair production when their central temperature reaches 1.5-2.0 x 10<sup>9</sup> <sup>0</sup>K. The collapse and subsequent explosion of stars...
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ndltd-CALTECH-oai-thesis.library.caltech.edu-92932019-12-21T03:06:23Z Supernovae explosions induced by pair production instability Fraley, Gary Scott <p>Stars with a core mass greater than about 30 M<sub>⊙</sub> become dynamically unstable due to electron-positron pair production when their central temperature reaches 1.5-2.0 x 10<sup>9</sup> <sup>0</sup>K. The collapse and subsequent explosion of stars with core masses of 45, 52, and 60 M<sub>⊙</sub> is calculated. The range of the final velocity of expansion (3,400 – 8,500 km/sec) and of the mass ejected (1 – 40 M<sub>⊙</sub>) is comparable to that observed for type II supernovae.</p> <p>An implicit scheme of hydrodynamic difference equations (stable for large time steps) used for the calculation of the evolution is described.</p> <p>For fast evolution the turbulence caused by convective instability does not produce the zero entropy gradient and perfect mixing found for slower evolution. A dynamical model of the convection is derived from the equations of motion and then incorporated into the difference equations. </p> 1967 Thesis NonPeerReviewed application/pdf https://thesis.library.caltech.edu/9293/1/Fraley_gs_1967.pdf https://resolver.caltech.edu/CaltechTHESIS:11302015-083154396 Fraley, Gary Scott (1967) Supernovae explosions induced by pair production instability. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/TJZ7-D968. https://resolver.caltech.edu/CaltechTHESIS:11302015-083154396 <https://resolver.caltech.edu/CaltechTHESIS:11302015-083154396> https://thesis.library.caltech.edu/9293/ |
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<p>Stars with a core mass greater than about 30 M<sub>⊙</sub> become dynamically unstable due to electron-positron pair production when their central temperature reaches 1.5-2.0 x 10<sup>9</sup> <sup>0</sup>K. The collapse and subsequent explosion of stars with core masses of 45, 52, and 60 M<sub>⊙</sub> is calculated. The range of the final velocity of expansion (3,400 – 8,500 km/sec) and of the mass ejected (1 – 40 M<sub>⊙</sub>) is comparable to that observed for type II supernovae.</p>
<p>An implicit scheme of hydrodynamic difference equations (stable for large time steps) used for the calculation of the evolution is described.</p>
<p>For fast evolution the turbulence caused by convective instability does not produce the zero entropy gradient and perfect mixing found for slower evolution. A dynamical model of the convection is derived from the equations of motion and then incorporated into the difference equations. </p>
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Fraley, Gary Scott |
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Fraley, Gary Scott Supernovae explosions induced by pair production instability |
author_facet |
Fraley, Gary Scott |
author_sort |
Fraley, Gary Scott |
title |
Supernovae explosions induced by pair production instability |
title_short |
Supernovae explosions induced by pair production instability |
title_full |
Supernovae explosions induced by pair production instability |
title_fullStr |
Supernovae explosions induced by pair production instability |
title_full_unstemmed |
Supernovae explosions induced by pair production instability |
title_sort |
supernovae explosions induced by pair production instability |
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1967 |
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https://thesis.library.caltech.edu/9293/1/Fraley_gs_1967.pdf Fraley, Gary Scott (1967) Supernovae explosions induced by pair production instability. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/TJZ7-D968. https://resolver.caltech.edu/CaltechTHESIS:11302015-083154396 <https://resolver.caltech.edu/CaltechTHESIS:11302015-083154396> |
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AT fraleygaryscott supernovaeexplosionsinducedbypairproductioninstability |
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1719304369797595136 |