Publications of the MPIfR
Optical & Infrared
Interferometry Group
Murakawa, K.; Ohnaka, K.; Driebe, T.;
Hofmann, K.-H.; Schertl, D.; Oya, S.; Weigelt, G.
NIR high-resolution imaging and radiative
transfer modeling of the Frosty Leo nebula
Planetary Nebulae in our Galaxy and Beyond
Proceedings of the International Astronomical Union, Symposium #234.
Edited by Michael J. Barlow and Roberto H. Méndez.
Cambridge: Cambridge University Press, 2006., pp.473-474
Abstract
We present a K'-band speckle image and HK-band polarimetric images of
the proto-planetary nebula Frosty Leo obtained using the 6 m SAO
telescope and the 8 m Subaru telescope, respectively. Our speckle image
revealed clumpy structures in the hourglass-like bipolar nebula. The
polarimetric data, for the first time, detected an elongated region
with small polarizations and polarization vector alignment on the east
side of the central star. We have performed radiative transfer
calculations to model the dust shell of Frosty Leo. We found that
micron-size grains in the equatorial dense region and small grains in
the bipolar lobes are required to explain the total intensity images,
the polarization images, and the spectral energy distribution.
You can get this publication ...