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Title: Hubble Space Telescope imaging of HD 44179, the Red Rectangle
Authors: Cohen, M
Van Winckel, Hans
Bond, HE
Gull, TR #
Issue Date: Apr-2004
Publisher: Univ chicago press
Series Title: Astronomical journal vol:127 issue:4 pages:2362-2377
Abstract: We present Hubble Space Telescope (HST) Wide Field Planetary Camera 2 and deep ground-based images of the Red Rectangle (RR), a bipolar proto - planetary nebula associated with the post-AGB binary system HD 44179. The high-resolution HST images reveal complex new structures, many of them unique to this object. The RR nebula is dominated by a discontinuous "bicone,'' whose bright, sharp linear edges give the nebula an overall X-shaped appearance. The edges of the bicone are connected by a remarkable series of linear features elongated perpendicular to the radius vector, giving the object a ladder-like structure. The "rungs'' of the ladder structure show a quasi-periodic spacing, suggesting that they have arisen from discrete episodes of mass loss from the central star, separated by a few hundred years. The total timescale over which mass has been shed into the visible nebula is of order 14,000 yr. Outside the X-shaped bicone, parabolas curl inward, resembling wineglasses, which terminate on the bicone edges in large, limb-brightened vortices. The central object is bisected by a dark band, indicating that the star is not seen directly but is instead obscured by a surrounding opaque dust disk.
ISSN: 0004-6256
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Institute of Astronomy
# (joint) last author

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