Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...110l...3h&link_type=abstract
Astronomy and Astrophysics, vol. 110, no. 1, June 1982, p. L3-L6.
Astronomy and Astrophysics
Astrophysics
60
Crab Nebula, Gravitational Collapse, Stellar Evolution, Stellar Mass Ejection, Supernovae, Neutron Stars, Shock Wave Propagation, Stellar Envelopes, Stellar Mass, Stellar Models
Scientific paper
The gravitational collapse of the inner core of a 10 solar mass star at the end of its thermonuclear evolution is computed. After core-carbon burning neon ignites off-center, followed by off-center oxygen burning, with the central neon core left intact. A semidegenerate 1.5 solar mass core of Ne and Si forms, surrounded by thin shells burning C, Ne, and O, about 1 solar mass of helium and a 7.5 solar mass red giant envelope. The core contracts and goes through several Ne flashes which finally eject the He-H material at about 300-500 km/s. The final result is a neutron star of 1.44 solar masses, with 0.06 solar mass of the core's material having been ejected, releasing about 5 x 10 to the 50th ergs in the envelope; the ejecta are not enriched in heavy elements. Although the model may not explain the average type II supernova, its properties are consistent with those of Crab-type events.
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