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Discovery of a Large High-Excitation Planetary Nebula

Published online by Cambridge University Press:  18 September 2017

J. N. Heckathorn ,
R.A. Fesen  and
T.R. Gull
J. N. Heckathorn
Affiliation:
Computer Sciences Corporation
R.A. Fesen
Affiliation:
NASA Goddard Space Flight Center
T.R. Gull
Affiliation:
NASA Goddard Space Flight Center

Extract

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The discovery of a new planetary nebula from (O III) interference filter imagery is reported. The nebula, PN 136 + 5°1, is 15′ in diameter and asymmetric in appearance. Spectrophotometry of the central regions indicate it is of excitation class between 8 and 10. A single bright condensation within the nebula exhibits emission lines of much lower ionization with (S II) λλ 6717, 6731 line intensities indicating an electron density of about 350 ± 150 cm−3. Seeing limited (O III) imagery of this planetary nebula is also presented. (This article is appearing in Astron. Astrophys. in the near future).

Type
Abstracts of Contributed Papers
Information
Symposium - International Astronomical Union , Volume 103: Planetary Nebulae , 1983 , pp. 545 - 546
Copyright
Copyright © Reidel 1983