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

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

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...353..549h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 353, April 20, 1990, p. 549-563.

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26

Astronomical Maps, Emission Spectra, Infrared Imagery, Planetary Nebulae, Astronomical Models, Data Reduction, High Resolution

Scientific paper

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.

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