The dark lane of the planetary nebula NGC 6302*†

Matsuura, M ORCID: https://orcid.org/0000-0002-5529-5593, Zijlstra, A. A, Molster, F. J, Waters, L. B. F. M, Nomura, H, Sahai, R and Hoare, M. G 2005. The dark lane of the planetary nebula NGC 6302*†. Monthly Notices of the Royal Astronomical Society 359 (1) , pp. 383-400. 10.1111/j.1365-2966.2005.08903.x

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Abstract

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 A_Hα= 5-7 mag and A_Brα= 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_solar. 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....

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	Oxford University Press
ISSN:	0035-8711
Date of Acceptance:	4 February 2005
Last Modified:	22 May 2024 15:30
URI:	https://orca.cardiff.ac.uk/id/eprint/168093

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