Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ap%26ss.224..533p&link_type=abstract
Astrophysics and Space Science, Volume 224, Issue 1-2, pp. 533-533
Astronomy and Astrophysics
Astrophysics
Stars:Planetary Nebulae, Stars:Stellar Winds, Stars:Filaments
Scientific paper
Intricate filamentary structure and multiple shell-like appearance are very common phenomena in Planetary Nebulae. In addition, recent observations also indicate that the individual filaments present in these objects can have larger velocities than the adjacent smooth background (Pascoli, 1992 PASP 104, 350 and paper quoted therein). We have hypothesized that non linear hydrodynamical processes existing within the nebular gas are, possibly, responsible for these structures. As a matter of fact, it is argued that such a characteristic morphology, reinterpreted as a intermingled network of solitary waves or solitons, can be spontaneously generated in Planetary Nebulae as soon as one assumes that the nebular gas is permeated by a weak magnetic field whose strength is about 10-5 to 10-4 gauss. Main results of this work and further comments will be subsequently published in Ap&SS.
Leclercq, Affiliation: AA(Faculte des Sciences, Physics Depa Amiens France) J.
Pascoli Gianni
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