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Title:
An infrared spatial study of the planetary nebula BD +30 deg 3639
Authors:
Bentley, A. F.; Hackwell, J. A.; Grasdalen, G. L.; Gehrz, R. D.
Affiliation:
AA(Wyoming, University; Wyoming Infrared Observatory, Laramie, WY), AB(Wyoming, University; Wyoming Infrared Observatory, Laramie, WY), AC(Wyoming, University; Wyoming Infrared Observatory, Laramie, WY), AD(Wyoming, University; Wyoming Infrared Observatory, Laramie, WY)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 278, March 15, 1984, p. 665-670. Research supported by the University of Wyoming, U.S. Air Force, and NSF. (ApJ Homepage)
Publication Date:
03/1984
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
COSMIC DUST, INFRARED SPECTRA, PLANETARY NEBULAE, SPATIAL DISTRIBUTION, BACKGROUND RADIATION, CONTINUOUS SPECTRA, HYDROGEN IONS, IMAGE PROCESSING, IMAGE RECONSTRUCTION, SPECTRAL BANDS
DOI:
10.1086/161834
Bibliographic Code:
1984ApJ...278..665B

Abstract

Spatial images of BD +30 deg 3639 were obtained in each of five spectral bands from 8.7 to 23 microns, using a beam of 3.4-arcsec diameter. The data were processed on the Wyoming image processing system using a newly implemented technique of maximum entropy image reconstruction. The combination of spatial oversampling and application of the maximum entropy technique allows details as small as 1.0-arcsec to be resolved in the reconstructed images. The spatial distribution of infrared emission by dust is compared to that of emission by ionized hydrogen in the nebula. Thermal emission by dust at 10 and 20 microns is found to be spatially coextensive with emission by ionized hydrogen. It is also found that the spatial distributions of 8.6 and 11.3 microns emission are spatially correlated and are different from the distribution of the 10-micron background emission. The spatial distribution of the 20 micron emission is different from those of both the 10 and the 8.6-11.3-micron emission.

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