Interacting winds and the shaping of planetary nebulae

Details Interacting winds and the shaping of planetary nebulae Interacting winds and the shaping of planetary nebulae

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...339..268s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 339, April 1, 1989, p. 268-278. Research supported by Technion - Israel Ins

Astronomy and Astrophysics

Astrophysics

124

Binary Stars, Hydrodynamics, Planetary Nebulae, Stellar Winds, Density Distribution, Stellar Envelopes, Stellar Evolution, Stellar Rotation, Supernova 1987A, Velocity Distribution

Scientific paper

Using two-dimensional hydrodynamics, the problem of shaping of planetary nebulae by the interacting winds model is studied. The shock structure is obtained and it is shown that interacting winds are capable of producing morphologies similar to the ones observed in planetary nebulae, provided that a density contrast exists between the equatorial and polar directions. This confirms recent suggestions by Balick. Mechanisms that can produce the required density contrast are discussed and it is shown that binary central stars provide the most natural mechanism, especially via common envelope evolution. It is not yet entirely clear whether stellar rotation is sufficient to generate the required contrast in the case of single central stars.

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