An expanding vortex site for the r-process in rotating stellar collapse

Details An expanding vortex site for the r-process in rotating stellar collapse An expanding vortex site for the r-process in rotating stellar collapse

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...291l..11s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 291, April 1, 1985, p. L11-L14. Research supported

Physics

13

Gravitational Collapse, Nuclear Fusion, Stellar Physics, Supernovae, Stellar Mass, Stellar Rotation, Velocity Distribution

Scientific paper

The astrophysical site of r-process nucleosynthesis is investigated theoretically using two-dimensional expanding-vortex stellar-collapse simulations based on the Eulerian adaptive-mesh MHD code of Symbalisty (1984). The results are presented graphically, and it is found that the classical r-process can be explained as the result of the collapse of the highly rotating iron core of a 15-solar-mass star, in which the angular velocity along the rotation axis reaches a maximum of 1000 rad/s, corresponding to an angular momentum of 3.4 x 10 to the 48th erg/s for the inner 1.5 solar mass. The ejected jets are shown to yield about 0.0004 solar mass per supernova, sufficient to explain the observed abundances of r-process products.

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