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

Published online by Cambridge University Press:  07 August 2017

J. L. Hora ,
L. K. Deutsch ,
W. F. Hoffmann ,
G. G. Fazio  and
K. Shivanandan
J. L. Hora
Affiliation:
Institute for Astronomy, 2680 Woodlawn Dr., Honolulu, HI 96822, USA
L. K. Deutsch
Affiliation:
NASA/Ames Research Center, M/S 245-6, Moffett Field, CA 94035, USA
W. F. Hoffmann
Affiliation:
Steward Observatory, University of Arizona, Tucson, AZ 85721, USA
G. G. Fazio
Affiliation:
Smithsonian Astrophys. Obs., 60 Garden Street, Cambridge, MA 02138, USA
K. Shivanandan
Affiliation:
Center for Advanced Space Sensing, NRL, Washington, DC 20375, USA

Abstract

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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.

Type
III. Highlights on the Nebulae
Information
Symposium - International Astronomical Union , Volume 155: Planetary Nebulae , 1993 , pp. 210
Copyright
Copyright © Kluwer 1993 

References

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