Ultraviolet Evidence for a Binary Nucleus of the Planetary Nebula SH 2-71
DOI: 10.1086/316370
Bibcode: 1999PASP..111..719F
Feibelman, Walter A.
United States
Abstract
Archival IUE spectra of the planetary nebula Sh 2-71 show a variable Mg II lambda2800 emission line superposed on a variable stellar continuum. The Mg II feature is thought to be excited in the chromosphere of the cooler component of a binary nucleus, although other causes are also plausible.
1999
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Publications of the Astronomical Society of the Pacific
IUE
7