Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12104/44713
Title: Stagnation knots in planetary nebulae
Author: Steffen, W.
Lopez, J.A.
Lim, A.J.
Issue Date: 2002
Abstract: We present an alternative model for the formation of fast low-ionization emission regions (FLIERs) in planetary nebulae. In this model, a concave bow-shock structure is formed as a result of a reduced momentum flow along the symmetry axis of a stellar wind. FLIERS are formed from the shocked ambient medium. Since in the concave region of the bow-shock the ambient material can not flow away from the symmetry axis, it is compressed into a dense knot or jet-like feature. In the presence of a variable stellar wind these knots eventually overrun the expanding nebular shell and may appear as detached FLIERS. We present two-dimensional hydrodynamic simulations of the formation and early evolution of stagnation knots and jets.
URI: http://www.scopus.com/inward/record.url?eid=2-s2.0-70649083985&partnerID=40&md5=8216302723c2f3242d093a6c1cdad550
http://hdl.handle.net/20.500.12104/44713
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