2005MNRAS.359..383M -
Mon. Not. R. Astron. Soc., 359, 383-400 (2005/May-1)
The dark lane of the planetary nebula NGC 6302.
MATSUURA M., ZIJLSTRA A.A., MOLSTER F.J., WATERS L.B.F.M., NOMURA H., SAHAI R. and HOARE M.G.
Abstract (from CDS):
The butterfly-shaped planetary nebula, NGC 6302, shows a unique, dense equatorial dark lane, which is presumably a dusty disc, obscuring an unobserved, very hot central star. We trace the structure of this disc using Hubble Space Telescope Hα and [N ii] images, Very Large Telescope L-and M-band images at 0.4-arcsec resolution, including Brα and polycyclic aromatic hydrocarbon (PAH) images, and a James Clerk Maxwell Telescope 450-µm image. Extinction maps are derived from these images. Within the disc, the extinction is AHα= 5-7 mag and ABrα= 1-2 mag. The 450-µm map shows a north-south elongated central core, tracing the massive dust disc, and extended emission from dust in the bipolar flows. A fit to the spectral energy distribution yields the disc dust mass of 0.03 M☉. The innermost region shows an ionized shell. The orientation of the polar axis shows a marked change between shell, disc and inner and outer outflow. The structures are well described by the warped-disc model of Icke (2003). PAH images are presented: PAH emission is found in the shell but avoids the disc. An infrared source is found close to the expected location of the central star.
Abstract Copyright:
2005 RAS
Journal keyword(s):
dust, extinction - ISM: jets and outflows - planetary nebulae: individual: NGC 6302
Simbad objects:
8
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