Spatial Distributions of Multiple Dust Components in the PPN/PN Dust Shells

Details Spatial Distributions of Multiple Dust Components in the PPN/PN Dust Shells Spatial Distributions of Multiple Dust Components in the PPN/PN Dust Shells

2000-10-11

arxiv.org/abs/astro-ph/0010208v1

Astronomy and Astrophysics

Astrophysics

4 pages + 7 figures, to appear in the proceedings of the conference, "Post-AGB Objects (proto-planetary nebulae) as a Phase of

Scientific paper

We investigate spatial distributions of specific dust components in the circumstellar shells of a proto-planetary nebula candidate, HD 179821, and a planetary nebula, BD$+30^{\circ}$3639, by means of spectral imaging. With high-resolution ground-based images and ISO spectra in the mid-infrared, we can derive ``dust feature only'' maps by subtracting synthesized continuum maps from the observed images at the feature wavelength. Such spatially detailed information will help to develop models for the evolution of dust grains around evolved stars.

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