Spectroscopic images of NGC 7027 in the near-infrared dust emission features

Journal Article · Sat Jul 01 04:00:00 EDT 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/167642· OSTI ID:5398545

Woodward, C E; Pipher, J L; Shure, M; Forrest, W J; Sellgren, K ^[1]

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1. Rochester Univ., NY (USA)

Isophote maps derived from spatially resolved moderate spectral resolution images of the planetary nebula NGC 7027 in the 3.28-micron and 3.4-micron 'unidentified' emission features, and in the Br-alpha hydrogen recombination line are presented. Comparison of these images clearly shows that the 3.28-micron emission is spatially more extended than the ionized gas. Analysis and modeling of the spatial distribution of the 3.28-micron feature strength suggest that roughly equal amounts of feature emission appear to come from within the H II region and from a shell outside the H II region. The spatial distribution of the 3.4-micron feature emission is found to be similar to that of the 3.28-micron feature emission. 40 refs.

• OSTI ID: 5398545
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 342; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC DUST
COSMIC RADIO SOURCES
DISTRIBUTION
DUSTS
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
FLUIDS
GASES
H2 REGIONS
IMAGES
INFRARED RADIATION
INFRARED SPECTRA
IONIZED GASES
NEAR INFRARED RADIATION
NEBULAE
PLANETARY NEBULAE
RADIATIONS
SPATIAL DISTRIBUTION
SPECTRA
SPECTROSCOPY