Explosive supernova core overturn and mass ejection

Details Explosive supernova core overturn and mass ejection Explosive supernova core overturn and mass ejection

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...236l.115c&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 236, Mar. 15, 1980, p. L115-L119. Research supported by the U.S. Dep

Astronomy and Astrophysics

Astrophysics

30

Stellar Mass Ejection, Supernovae, Entropy, Leptons, Neutrinos, Particle Energy, Taylor Instability

Scientific paper

It is shown that Rayleigh-Taylor convective overturn of the dynamically formed lepton-trapped core of a supernova is a likely outcome of three sequential events: (1) the bounce or weak reversal shock; (2) the diffusive and convective lepton release from the neutrinosphere during a fraction of the reversal time (approximately 100 msec); and (3) the rapid (less than approximately 10 msec) Rayleigh-Taylor growth of the l = 2 mode of an initial rotational perturbation. The overturn is explosive in the sense that the increase of gravitational binding energy appears as radial outgoing kinetic energy of a fraction of the mass of the core. The increased binding energy is due to the adiabatic interchange of lepton-poor 'heavier' matter from the outside of the core with lepton-trapped matter from the center of the core. The difference in binding energy is 30-50 MeV per nucleon. The resulting kinetic energy of approximately 7 x 10 to the 52nd ergs is more than adequate to cause the observed supernova emission. Also, it is larger than the approximately 7 x 10 to the 51st ergs of approximately 10-MeV neutrinos suddenly released from the neutrinosphere as previously noted by Colgate (1978) and by Bruenn, Buchler, and Livio (1980).

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