BVRI Imaging Polarimetry of the Frosty Leo Nebula

Details BVRI Imaging Polarimetry of the Frosty Leo Nebula BVRI Imaging Polarimetry of the Frosty Leo Nebula

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.268..615s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 268, NO. 3/JUN1, P. 615, 1994

Astronomy and Astrophysics

Astronomy

9

Polarization - Dust, Extinction - Planetary Nebulae: Individual: Frosty Leo - Reflection Nebulae

Scientific paper

Multiwaveband imaging polarimetry of the Frosty Leo nebula shows that it is a highly polarized, bipolar protoplanetary system with a source which is hidden from direct view in the equatorial plane by a thin and radially extensive disc. The high polarizations (up to 60 per cent) in the outer ansae (extensions) cannot be explained in terms of Mie scattering from grains with sizes typical of the interstellar medium, and we propose a grain size distribution which is a power law with an index n ˜ 5.2-5.5 and a lower size limit αmin ˜0.1μm.
We speculate on the role played by magnetic fields in influencing the outflows from evolving post-MS stars.

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