Discovery of magnetic fields in CPNs

Details Discovery of magnetic fields in CPNs Discovery of magnetic fields in CPNs

2004-10-21

arxiv.org/abs/astro-ph/0410509v1

Astronomy and Astrophysics

Astrophysics

4 LaTeX pages, 4 eps figures, to appear in the proceedings of the 14th European Workshop on White Dwarfs, eds. D. Koester and

Scientific paper

For the first time we have directly detected magnetic fields in central stars of planetary nebulae by means of spectro-polarimetry with FORS1 at the VLT. In all four objects of our sample we found kilogauss magnetic fields, in NGC 1360 and LSS1362 with very high significance, while in Abell36 and EGB5 the existence of a magnetic field is probable but with less certainty. This discovery supports the hypothesis that the non-spherical symmetry of most planetary nebulae is caused by magnetic fields in AGB stars. Our high discovery rate demands mechanisms to prevent full conservation of magnetic flux during the transition to white dwarfs.

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