Other
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..191c&link_type=abstract
Lunar and Planetary Science, volume 27, page 191
Other
1
Collapse: Time, Molecular Cloud Core, Radioactivity: Extinct, Solar Nebula, Supernova Trigger
Scientific paper
A number of years ago Jim Truran and I proposed, primarily as a mechanism for bringing short-lived radioactivities and other isotopic anomalies into the solar nebula, that the collapse of a molecular cloud core to form the solar nebula was triggered by the arrival of a shock wave generated by the explosion of a supernova a few parsecs away. The idea was premature as the observational and theoretical data needed for its analysis was not yet present in sufficient detail. More recently, a small consortium of us revived the supernova trigger based on theoretical yields from massive supernovas and on meteoritic data; we estimated that shock velocities of 10-25 km/sec would suffice to do the job if supernovas of initial 25-60 solar masses exploded at 2-10 parsecs from the parental nebular cloud core. The needed efficiency for incorporating incident material into the collapsing core was estimated to be a few tens of percent. In the current presentation a more detailed discussion of the triggering event is given. Smooth particle hydrodynamic simulations are under way here and conventional hydrodynamic simulations are being carried out by Boss and colleagues.
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