An exploding 10 M. star: a model for the Crab supernova.
Abstract
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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 1982
- Bibcode:
- 1982A&A...110L...3H
- Keywords:
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- Crab Nebula;
- Gravitational Collapse;
- Stellar Evolution;
- Stellar Mass Ejection;
- Supernovae;
- Neutron Stars;
- Shock Wave Propagation;
- Stellar Envelopes;
- Stellar Mass;
- Stellar Models;
- Astrophysics