A spectroscopic atlas of post-AGB stars and planetary nebulae selected from the IRAS point source catalogue
Aims.We study the optical spectral properties of a sample of stars showing far infrared colours similar to those of well-known planetary nebulae. The large majority of them were unidentified sources or poorly known in the literature at the time when this spectroscopic survey started, some 15 years ago. Methods: .We present low-resolution optical
Suárez, O. et al.
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2006