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Extinction Maps and Dust Distribution of Planetary Nebulae

Published online by Cambridge University Press:  26 May 2016

Ting-Hui Lee ,
Sun Kwok  and
Jeremy Lim
Ting-Hui Lee
Affiliation:
Department of Physics and Astronomy, University of Calgary, Calgary, Canada T2N 1N4
Sun Kwok
Affiliation:
Department of Physics and Astronomy, University of Calgary, Calgary, Canada T2N 1N4
Jeremy Lim
Affiliation:
Institute of Astronomy and Astrophysics, Academia Sinica, P.O. Box 23-141, Taipei, Taiwan 106

Abstract

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We present an indirect method to probe the dust distribution in PNe. Using the free-free continuum flux density and Hβ recombination line flux relationship and the Case B Hα/Hβ line ratio, we determined the expected Hα flux from the radio continuum maps. The dust optical depth distribution of each planetary nebula was then derived from the expected to observed Hα flux ratio. With HST WFPC2 and VLA A-array observations, dust optical depth maps with resolution as high as ~ 0.1″ can be obtained.

Type
Part V: Dust and Molecules in Planetary Nebulae
Information
Symposium - International Astronomical Union , Volume 209: Planetary Nebulae: Their Evolution and Role in the Universe , 2003 , pp. 317 - 318
Copyright
Copyright © Astronomical Society of the Pacific 2003 

References

Pottasch, S. R. 1984 in Planetary Nebulae: A Study of Late Stages of Stellar Evolution (Dordrecht: D. Reidel Publishing Company)Google Scholar