Magnetic Fields in Post-AGB Stars

Details Magnetic Fields in Post-AGB Stars Magnetic Fields in Post-AGB Stars

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..378..337s&link_type=abstract

Why Galaxies Care About AGB Stars: Their Importance as Actors and Probes. ASP Conference Series, Vol. 378, proceedings of the co

Astronomy and Astrophysics

Astronomy

2

Scientific paper

Between the AGB and the Planetary Nebula phase we observe an evolution in the shaping of some stars: from a spherical symmetry they become elliptical, bipolar, or even quadripolar. The shaping of late-type stars is still not well understood and several theories are suggested. Among them is the action of magnetic fields, which have been detected in AGB stars via maser measurements and also measured in the central stars of some PNe. We present here new submillimeter (450 and 850 μm) polarimetric data, obtained with SCUBA at the JCMT, for four bipolar post-AGBs and PNe: NGC 6537, NGC 7027, NGC 6302 and CRL 2688. The geometry of the magnetic field is determined by dust alignment. These new data will allow us to better understand the role played by magnetic fields not only in post-AGBs but also in AGBs where departures from sphericity have been observed.

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