Bibcode
Manchado, A.; Suárez, Olga; García-Lario, Pedro; Manteiga, Minia; Pottasch, Stuart R.
Bibliographical reference
Post-AGB Objects as a Phase of Stellar Evolution, Proceedings of the Toruń Workshop held July 5-7, 2000. Edited by R. Szczerba and S. K. Górny. Astrophysics and Space Science Library Vol. 265, ISBN 07923-71453. Publisher: Kluwer Academic Publishers, Boston/Dordrecht/London, 2001.
Advertised on:
8
2001
Citations
0
Refereed citations
0
Description
Over the past 12 years we have been conducting a survey of IRAS (PSC)
sources with dust temperatures between 100 and 250 K, which is the
temperature of AGB shells after mass loss has ceased. About 1000 PSC
sources fulfill this criterion, about half of them identified previously
in the literature: most are PNe (49%) and post-AGB stars (27%), but
there is also a small fraction of young stellar objects and active
galaxies. In order to classify the unidentified sources, we took low
resolution spectra of these objects, in the range from 3500 to 9000
Å. The region between 3600 and 5050 Å has been used to carry
out the spectral classification of most of the unidentified sources.
Partial results are presented here: of the 187 objects studied, 34 were
PNe, 10 proto-PNe and 103 post-AGB candidates with or without Hα
emission. The rest have been identified as young stellar objects (34),
LBVs (2), and active galaxies (3).