Filaments as Possible Signatures of Magnetic Field Structure in Planetary Nebulae

Details Filaments as Possible Signatures of Magnetic Field Structure in Planetary Nebulae Filaments as Possible Signatures of Magnetic Field Structure in Planetary Nebulae

2005-03-31

arxiv.org/abs/astro-ph/0503681v1

Publ.Astron.Soc.Pac.117:665,2005

Astronomy and Astrophysics

Astrophysics

26 pages with 7 figures. To be published in PASP. For full resolution images see http://physics.nyu.edu/~pjh1

Scientific paper

10.1086/430576

We draw attention to the extreme filamentary structures seen in high-resolution optical images of certain planetary nebulae. We determine the physical properties of the filaments in the nebulae IC 418, NGC 3132, and NGC 6537, and based on their large length-to-width ratios, longitudinal coherence, and morphology, we suggest that they may be signatures of the underlying magnetic field. The fields needed for the coherence of the filaments are probably consistent with those measured in the precursor circumstellar envelopes. The filaments suggest that magnetic fields in planetary nebulae may have a localized and thread-like geometry.

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