Abstract
The IRAS Point Source Catalogue containing about 250,000 sources has yielded a large number of previously unknown planetary nebulae (PNe) and a smaller number of proto-planetary nebulae (PPNe). The spectral energy distributions for many of these objects peak at or close to 25µm. A program to optically identify sources in the complete IRAS Faint Source Database, which comprises about 750,000 sources, is currently under way (Wolstencroft et al. 1991), and in a related study Wolstencroft, Parker & Lonsdale are carrying out a spectroscopic survey of a small sample of the approximately 106,000 sources which either peak or are detected only at 25µm. So far spectra of 150 sources have been obtained: 3 of these sources are PNe and 1 is a PPNe. This suggests that this sample of 25µm emitters may be a rich source of new PNe and PPNe. In this note we discuss two of these four sources.
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© 1993 Springer Science+Business Media Dordrecht
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Wolstencroft, R.D., Read, M.A., Scarrott, S.M., Lonsdale, C.J., Parker, Q.A. (1993). Planetary and Proto-Planetary Nebulae which are Strong 25µm Emitters. In: Weinberger, R., Acker, A. (eds) Planetary Nebulae. International Astronomical Union / Union Astronomique Internationale, vol 155. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2088-3_10
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DOI: https://doi.org/10.1007/978-94-011-2088-3_10
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