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Near- and Mid-Infrared Imaging of the PN IC 418

  • J. L. Hora (a1), L. K. Deutsch (a2), W. F. Hoffmann (a3), G. G. Fazio (a4) and K. Shivanandan (a5)...

Abstract

We present high-resolution near- and mid-infrared images of the planetary nebula IC 418 at 1.2 (J), 1.6 (H), 2.2 (K), 9.8, and 11.7 μm. The near-IR images were obtained with a 64×64 pixel Hg:Cd:Te array camera, and the mid-IR images were obtained using the new 20×64 pixel Mid-Infrared Array Camera (MIRAC). The size of IC 418 in the near-IR is seen to vary with wavelength, being largest at K and smallest at J. Differences in the morphology of the nebula are seen between the J and K images. There is excess near-IR emission in the center of the nebula, after subtracting out the emission from the central star. Faint halo emission is detected at H and K, extending to a total diameter of approximately 40″. The 9.8 μm emission is distributed nonsymmetrically, with the peak in the NE lobe.

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References

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Hora, J. L. 1991, Ph. D. Dissertation, University of Arizona

Near- and Mid-Infrared Imaging of the PN IC 418

  • J. L. Hora (a1), L. K. Deutsch (a2), W. F. Hoffmann (a3), G. G. Fazio (a4) and K. Shivanandan (a5)...

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