Near- and mid-infrared imaging of the planetary nebulae BD +30 deg 3639 and IC 418

Details Near- and mid-infrared imaging of the planetary nebulae BD +30 deg 3639 and IC 418 Near- and mid-infrared imaging of the planetary nebulae BD +30 deg 3639 and IC 418

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...413..304h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 413, no. 1, p. 304-316.

Astronomy and Astrophysics

Astronomy

28

Infrared Astronomy, Infrared Imagery, Interstellar Matter, Planetary Nebulae, Emission Spectra, Stellar Evolution

Scientific paper

We present near- and mid-IR images of the planetary nebulae BD +30 deg 3639 and IC 418, with a unique combination of high spatial and spectral resolution. The mid-IR images were obtained with MIRAC, a new IR array camera. For BD +30 deg 3639, the mid-IR images at 10.0, 11.2, 12.4, 12.8, and 13.2 microns have allowed us to separate the various spectral emission components such as the broad UIR features, the 12.8-micron forbidden Ne II emission feature, and continuum emission, to determine the distribution of these components in the nebula. For IC 418, we have obtained high-resolution images in both the near- and mid-IR. The images in the near-IR at J, H, and K are important for determining the source of the IR excess; one component of the excess is located near the central star. We have also imaged the halo emission at H and K, which has been detected in earlier studies, and have determined its spatial extent. The mid-IR images at 9.8 and 11.7 microns show continuum emission coincident with the ionized zone and suggest that SiC emission originates from the region near the central star.

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