High-resolution 8-13 micron imaging of the planetary nebulae BD + 30 deg 3639 and NGC 6572

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168643· OSTI ID:7041626

Hora, J L; Hoffmann, W F; Deutsch, L K; Fazio, G G ^[1]

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1. Steward Observatory, Tucson, AZ (USA) Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (USA)

High-resolution midinfrared images of the planetary nebulae BD + 30 deg 3639 and NGC 6572 are presented at 8.3, 8.7, 9.8, 11.2, and 12.4 microns. Analysis of the maps of BD + 30 deg 3639 supports a model in which the infrared emission originates from two spatially distinct components, one which is responsible for the continuum radiation at 8-12 microns and the other which produces the emission-line features. The NGC 6572 images provides evidence for a previously undetected 11.2 micron UIR emission feature. Comparison with radio continuum maps indicates that the distribution of dust is similar to the distribution of ionized gas in each nebula. Various models of source morphology are also investigated. The planetary nebulae DB + 30 deg 3639 and NGC 6572 can be modeled by an optically thin cylinder or a prolate ellipsoid with enhanced equatorial emission. These models reproduce well the general features of the nebula, such as the bipolar lobes of emission and the ring structure. 67 refs.

• OSTI ID: 7041626
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 353; 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
COMPARATIVE EVALUATIONS
COSMIC DUST
DATA PROCESSING
DUSTS
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
FLUIDS
GASES
IMAGES
INFRARED RADIATION
IONIZED GASES
MAPS
MATHEMATICAL MODELS
NEBULAE
PLANETARY NEBULAE
PROCESSING
RADIATIONS
RADIOWAVE RADIATION
RESOLUTION
SPECTRA
STAR MODELS