Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....80..147m&link_type=abstract
Astronomy and Astrophysics, vol. 80, no. 2, Dec. 1979, p. 147-154.
Astronomy and Astrophysics
Astrophysics
44
Gravitational Collapse, Magnetohydrodynamics, Stellar Models, Supernovae, Angular Momentum, Neutron Stars, Stellar Magnetic Fields, Stellar Mass Ejection, Velocity Distribution
Scientific paper
A model for supernova explosions of massive stars in which mass ejection is caused by a two-step process is presented. In the first stage the rebounce of the core at nuclear density generates a hydrodynamical shock wave; if this shock is not sufficient for mass ejection reimplosion of the stellar mantle results. During collapse the core spins much more rapidly than the mantle amplifying the magnetic field by winding the magnetic field lines. For sufficiently large initial magnetic field strength values the magnetic pressure becomes comparable to the thermal pressure in a small region near the collapsed core, pushing the matter outwards, and thus generating a second magnetohydrodynamical shock. Results showed mass ejection with energies of about several times 10 to the 50th power erg leaving behind a neutron star of approximately 1-1.5 solar mass.
Hillebrandt Wolfgang
Mueller Ewald
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