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An O VIII Sequence for Planetary Nebula Nuclei
Publications of the Astronomical Society of the Pacific, 1996The detection of O VIII emission lines in ultraviolet and optical spectra of high-excitation planetary nebula central stars suggests an "O VIII Sequence" for these object. Emission lines of O VII are also detected. Seven out of ten central stars for these planetaries are known to be nonradial g-mode pulsators. The stars form a narrow strip when plotted
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The Nuclei of Planetary Nebulae as Progenitors of White Dwarfs
1971Stellar evolution is characterized by fast and slow phases. Usually the periods of rapid change are difficult to follow observationally; but, this does not seem to be the case when passing through the planetary nebula stage. Because of their high intrinsic luminosities and easy identification, it is possible to identify and study these objects and ...
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Temperatures of the Nuclei of Planetary Nebulae
Astronomische Nachrichten, 1931openaire +1 more source
ON THE LUMINOSITIES OF THE NUCLEI OF PLANETARY NEBULAE
Publications of the Astronomical Society of the Pacific, 1927openaire +1 more source
[WR] nuclei of planetary nebulae: Inferences from statistical studies of the nebulae
Astrophysics and Space Science, 1996G Stasińska, Stasińska Grazyna
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Spectroscopic studies of four planetary nebulae with emission-line nuclei
Astronomy Letters, 2013M A Burlak, A Y Kniazev, Kniazev A Yu
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Morphologies of planetary nebulae ejected by close-binary nuclei
Astrophysical Journal, 1990Howard E Bond, Mario Livio
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Shapes and Shaping of Planetary Nebulae
Annual Review of Astronomy and Astrophysics, 2002Bruce Balick, Adam Frank
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