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New Observations of Planetary Nebulae S22 and YM29

Published online by Cambridge University Press:  19 July 2016

V.P. Arkhipova ,
T.A. Lozinskaya ,
E.I. Moskalenko  and
T.G. Sitnik
V.P. Arkhipova
Affiliation:
Sternberg Astronomical Institute, Moscow, USSR
T.A. Lozinskaya
Affiliation:
Sternberg Astronomical Institute, Moscow, USSR
E.I. Moskalenko
Affiliation:
Sternberg Astronomical Institute, Moscow, USSR
T.G. Sitnik
Affiliation:
Sternberg Astronomical Institute, Moscow, USSR

Abstract

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Spectral and monochromatic observations of two thin-filamentary nebulae S22 and YM29 have been carried out in the lines [O III] 5007A, [N II] 6584A and [S II] 6717+6732A. Radial stratification of the emission typical for photoionization excitation has been found: displacement between [O III] - bright regions and [S II] - and [N II] -bright regions is equal ΔR ∼ 0.1R (about 0.01 to 0.2 pc), the first ones being closer to the nuclei. Both nebulae are characterized by more diffuse morphology in the [O III] line and by thin-filamentary one in the [N II] and [S II] lines.

Type
I. Observational Data on Nebulae
Information
Symposium - International Astronomical Union , Volume 131: Planetary Nebulae , 1989 , pp. 50
Copyright
Copyright © Kluwer 1989