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Ionic Abundances of S III, O IV and NeV from Infrared Observations of Fine Structure Lines in eight Planetary Nebulae

Published online by Cambridge University Press:  18 September 2017

M.A. Shure ,
T.L. Herter ,
J.R. Houck ,
D.A. Briotta Jr. ,
W.J. Forrest ,
G.E. Gull  and
J.F. McCarthy
M.A. Shure
Affiliation:
Center for Radiophysics and Space Research, Cornell University, Ithaca, NY 14853, USA
T.L. Herter
Affiliation:
Center for Radiophysics and Space Research, Cornell University, Ithaca, NY 14853, USA
J.R. Houck
Affiliation:
Center for Radiophysics and Space Research, Cornell University, Ithaca, NY 14853, USA
D.A. Briotta Jr.
Affiliation:
Center for Radiophysics and Space Research, Cornell University, Ithaca, NY 14853, USA
W.J. Forrest
Affiliation:
Center for Radiophysics and Space Research, Cornell University, Ithaca, NY 14853, USA
G.E. Gull
Affiliation:
Center for Radiophysics and Space Research, Cornell University, Ithaca, NY 14853, USA
J.F. McCarthy
Affiliation:
Center for Radiophysics and Space Research, Cornell University, Ithaca, NY 14853, USA

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The Kuiper Airborne Observatory has been used to make measurements of the infrared forbidden lines of (SIII) 18.72μm, (NeV) 24.28μm and (OIV) 25.87μm in eight planetary nebulae. In all cases the beam was larger than the emitting region. The observed line fluxes are used to determine ionic abundances under the assumption of constant density throughout the relevant volume as determined by optical observations. In some cases the NeV near UV lines are used in conjunction with the infrared measurements to determine the electron temperature in the NeV emission regions. The (SIII) 33.47μm line can be used with the (SIII) 18.72μm line flux to characterize the clumping within the nebulae.

Type
Abstracts of Contributed Papers
Information
Symposium - International Astronomical Union , Volume 103: Planetary Nebulae , 1983 , pp. 512
Copyright
Copyright © Reidel 1983