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Paper: HST/NICMOS imaging of the Planetary Nebula BD+30o3639
Volume: 199, Asymmetrical Planetary Nebulae II: From Origins to Microstructures
Page: 263
Authors: Latter, William B.; Dayal, Aditya; Bieging, John H.; Kelly, Douglas M.; Hora, Joseph L.; Tielens, A. G. G. M.
Abstract: We present observations of the planetary nebula BD+30ˆ3639 using the Near Infrared Camera Multi-Object Spectrometer (NICMOS) aboard the Hubble Space Telescope (HST). The data show the relationship between the neutral and ionized gas. Images that isolate H2 emission show rings and loops, which we interpret as brightened rims of inclined biconical structures. This structure encloses the roughly elliptical ionized region. Our 3-D models of BD+30ˆ3639 are preliminary, but refined models mimic very well the observed structure in NGC 7027 - which appears similar in BD+30ˆ3639 - and reveal the 3-D characteristics of the photodissociation front and ionized core. The structures seen in molecular hydrogen emission, in tracers of the ionized core, and in scattered light appear different and spatially distinct. This type of three component morphology is seen in several of our NICMOS targets.
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