Optical Classification of IRAS Post-AGB Candidates |
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Authors: | O Suárez M Manteiga A Ulla P García-Lario A Manchado Torres |
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Institution: | (1) Departamento de Física Aplicada, Universidade de Vigo, E-36200 Vigo, Spain |
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Abstract: | We present the first results of a survey carried out on a sample of optically bright post-AGB candidates selected from the
IRAS Point Source Catalogue, many of them previously unidentified in the literature. The selection criteria are based on their
characteristic far infrared colours. Low resolution spectroscopy of more than 150 sources has been obtained during 6 years.
Our preliminary analysis confirms that most of the candidates observed are true post-AGB stars, some of them still strongly
reddened. Some young planetary nebulae, a few young stellar objects and active galactic nuclei are also present in the sample.
The distribution of post-AGB stars with different spectral types in the IRAS two-colour diagram and its evolutionary implications
are briefly discussed.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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