Injection of radioactive nuclides from the stellar source that triggered the collapse of the presolar cloud core

Details Injection of radioactive nuclides from the stellar source that triggered the collapse of the presolar cloud core Injection of radioactive nuclides from the stellar source that triggered the collapse of the presolar cloud core

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..375f&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 375.

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1

Red Giant Stars, Molecular Clouds, Nuclides, Gravitational Collapse, Supernovae, Radioactivity, Meteorites, Stellar Radiation, Shock Wave Interaction, Particle Trajectories, Hydrodynamic Equations

Scientific paper

It had been previously shown by the authors how shock waves from distant supernovae or nearby red giant stars could have triggered the collapse of the presolar cloud. This paper now turns to the question of injecting matter from the shock wave into the collapsing cloud. This is motivated by a desire to explain the evidence for freshly synthesized short-lived radioactivities in primitive meteorites. The gravitational capture of shock-wave gas and dust as it impacts and triggers the collapse of a molecular cloud core is examined. Two complementary techniques are used to follow the shock-wave material: (1) a set of tracer particles, which allows for the calculation of trajectories for specific particles, and (2) a color field, much like a dye, which is treated in the same manner as the hydrodynamic density variable. In both isothermal and hot shock stellar trigger assumptions used in the axisymmetric hydrodynamical models calculated here, it is found that roughly 20 percent of the shock material with an initial impact parameter less than the cloud core's initial radius is injected into the cloud.

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