AAS 201st Meeting, January, 2003
Session 22. Highly Structured Outflows from Post MS-Stars
Special, Monday, January 6, 2003, 10:00-11:30am, 6AB

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[22.09] Mass Loss From SN Ib/c Progenitors

P. A. Young, D. Arnett (Steward Observatory, The University of Arizona)

We examine mass loss in possible SN Ib/c progenitor stars. Super-Eddington luminosities are seen at the base of the hydrogen envelope in 1-D stellar evolution simulations for stars exceeding approximately 40 solar masses. The resulting hydrodynamic instabilities are modelled in multi-dimensional numerical simulations as a possible mechanism for the catastrophic mass loss seen in luminous blue variables (LBVs) and the complete envelope loss leading to a Wolf-Rayet morphology. The evolution of the ejected mass is followed, as structure produced by instabilities in the outflowing material may have an important and observable effect on the subsequent evolution of a supernova remnant.

This work was supported by a grant from the D.O.E. and a subcontract from the ASCI FLASH Center at the University of Chicago.

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Bulletin of the American Astronomical Society, 34, #4
© 2002. The American Astronomical Soceity.