Optical Classification of IRAS Post-AGB Candidates

Details Optical Classification of IRAS Post-AGB Candidates Optical Classification of IRAS Post-AGB Candidates

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998ap%26ss.263..283s&link_type=abstract

Astrophysics and Space Science, v. 263, Issue 1/4, p. 283-286 (1998).

Astronomy and Astrophysics

Astrophysics

Scientific paper

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.

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