Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980icar...42...35h&link_type=abstract
Icarus, vol. 42, Apr. 1980, p. 35-42.
Astronomy and Astrophysics
Astrophysics
3
Astronomical Models, Astrophysics, Cosmology, Protostars, Solar System, Supernovae, Big Bang Cosmology, Planetary Evolution, Stellar Evolution, Solar System, Formation, Supernova, Models, Isotopic Anomalies, Mass, Meteorites, Aluminum 26, Clouds, Injection, Inclusions, Compression, Allende Meteorite, Magnesium 26, Element Ratios, Irradiation, Hypotheses, Collapse
Scientific paper
Four possible scenarios relating the proto-solar cloud to the 'last-minute' supernova presumed responsible for the isotopic anomalies in Allende and other meteorites are considered. The probability that a chance supernova occurred close enough to an already-collapsing proto-solar cloud to inject sufficient matter is extremely small, even if the sun formed in a region of enhanced supernova activity such as Orion OB1. The ambient level of Al-26 inside a molecular cloud in Orion is also apparently too low to account for the meteorite data, unless the supernova ejecta accumulates at the edges of the cloud and star formation occurs there preferentially. Two modes of supernova-induced star formation are discussed. In one, the supernova shock collapses a preexisting cloud; in the other, stars form within the snowplow shell of the supernova. Canis Major R1 and Monoceros R1 are possible present-day examples of such star formation regions.
Herbst William
Rajan Sundar R.
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