Disks around evolved stars? (bipolar nebulae and SN 1987A).

Details Disks around evolved stars? (bipolar nebulae and SN 1987A). Disks around evolved stars? (bipolar nebulae and SN 1987A).

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992dudi.work...69p&link_type=abstract

"Dusty Discs, Proceedings of the 9th RAL Workshop on Astronomy and Astrophysics. Edited by P.M. Gondhalekar.

Astronomy and Astrophysics

Astrophysics

Scientific paper

The authors review the observational evidence for disk-like outflows from evolved stars and discuss theoretical ideas for their origin. Disk-like structures are seen around AGB stars, bipolar proto-planetary nebulae, planetary nebulae and SN 1987A. Most of these structures are consistent with an equatorially enhanced radial outflow, but some show the signature of rotation, consistent with rotating disks. Theoretical models fall into two classes: single-star and binary models. Primordial disks, non-radial pulsations and magnetic fields are the ingredient in the major single-star scenarios, while binary interaction can affect stellar outflows in at least three different ways (stellar merging common-envelope ejection and gravitational wind interaction). The authors estimate that at least ≡35% of all stellar outflows from evolved stars are affected by binary interaction.

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