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: Supernovae Explosions Induced by Pair Production Instability


Fraley, Gary Scott (1967) : Supernovae Explosions Induced by Pair Production Instability. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/TJZ7-D968.


Stars with a core mass greater than about 30 M become dynamically unstable due to electron-positron pair production when their central temperature reaches 1.5-2.0 x 109 0K. The collapse and subsequent explosion of stars with core masses of 45, 52, and 60 M is calculated. The range of the final velocity of expansion (3,400 – 8,500 km/sec) and of the mass ejected (1 – 40 M) is comparable to that observed for type II supernovae.

An implicit scheme of hydrodynamic difference equations (stable for large time steps) used for the calculation of the evolution is described.

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.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:(Physics)
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Christy, Robert F.
Thesis Committee:
  • Unknown, Unknown
Defense Date:11 April 1967
Funding AgencyGrant Number
Record Number:CaltechTHESIS:11302015-083154396
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9293
Deposited On:30 Nov 2015 21:10
Last Modified:18 Mar 2024 18:56

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