NASA NTRS · 19720049793
The peculiar nebula M2-9.
Abstract
The spectrum of M2-9 is analyzed and its strong infrared excess and internal motions are described. It is suggested that M2-9 is a previously unannounced member of the class of objects possessing strong Fe II emission lines in their spectra and having prominent infrared continua.
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Allen, D. A., Swings, J. P.. 1972-06-15. The peculiar nebula M2-9.. https://ntrs.nasa.gov/citations/19720049793
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