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Hα and Hβ Imaging of the Planetary Nebula NGC 6302

Published online by Cambridge University Press:  25 April 2016

Michael C. B. Ashley
Michael C. B. Ashley*
Affiliation:
Mount Stromlo and Siding Spring Observatories, Australian National University; now at School of Physics, University of New South Wales, P.O. Box 1, Kensington, NSW 2033
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Abstract

NGC 6302 is one of the highest excitation planetary nebulae known. It has an obscured central star with a temperature estimated at 430,000 K. We present here CCD images in Hα and Hβ of NGC 6302, and interpret the differences between the images as being due to extinction caused by dust within the nebula. The dust appears to be concentrated in the core, as expected from infrared observations. There is no evidence of patchy foreground extinction, although there is a slight difference in the average extinction between the eastern and western lobes of the nebula. A comparison between the Hα image and a 5 GHz map gives a dust extinction of ΔAV~3.5 to the central star. The outer contours of the 5 GHz map are not in good agreement with the optical images, and further observations at this frequency would be useful.

Type
Galactic and Stellar
Information
Publications of the Astronomical Society of Australia , Volume 8 , Issue 4 , 1990 , pp. 360 - 363
Copyright
Copyright © Astronomical Society of Australia 1990

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