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A&A Supplement Series, Vol. 125, November I 1997, 419-437

Received March 30, 1996; accepted January 22, 1997

Obscured AGB stars in the Magellanic Clouds

I. IRAS candidates

C. Louptex2html_wrap1566, A.A. Zijlstratex2html_wrap1568, L.B.F.M. Waterstex2html_wrap1570, - M.A.T. Groenewegentex2html_wrap1572

Send offprint request: loup at
tex2html_wrap540  Institut d'Astrophysique de Paris, CNRS, 98 bis Bd. Arago, F-75014 Paris, France
tex2html_wrap540  European Southern Observatory, Casilla 19001, Santiago 19, Chile
tex2html_wrap542  European Southern Observatory, Karl-Schwarzschild Strasse 2, D-85748 Garching bei München, Germany
tex2html_wrap544  Astronomical Institute Anton Pannekoek, University of Amsterdam, Kruislaan 403, NL-1098 SJ Amsterdam, The Netherlands
tex2html_wrap546  Max-Planck-Institut für Astrophysik, Karl-Schwarzschild 1, D-85740 Garching, Germany


We have selected 198 IRAS sources in the Large Magellanic Cloud, and 11 in the Small Magellanic Cloud, which are the best candidates to be mass-loosing AGB stars (or possibly post-AGB stars). We used the catalogues of Schwering & Israel (1990) and Reid et al. (1990). They are based on the IRAS pointed observations and have lower detection limits than the Point Source Catalogue. We also made cross-identifications between IRAS sources and optical catalogues.

Our resulting catalogue is divided in 7 tables. Table 1 (click here) lists optically known red supergiants and AGB stars for which we found an IRAS counterpart (7 and 52 stars in the SMC and LMC, respectively). Table 2 (click here) lists "obscured'' (or "cocoon'') AGB stars or late-type supergiants which have been identified as such in previous works through their IRAS counterpart and JHKLM photometry (2 SMC and 34 LMC sources; no optical counterparts). Table 3 (click here) lists known planetary nebulae with an IRAS counterpart (4 SMC and 19 LMC PNe). Table 4 (click here) lists unidentified IRAS sources that we believe to be good AGB or post-AGB or PNe candidates (11 SMC and 198 LMC sources). Table 5 (click here) lists unidentified IRAS sources which could be any type of object (23 SMC and 121 LMC sources). Table 6 (click here) lists IRAS sources associated with foreground stars (29 SMC and 135 LMC stars). Table 7 (click here) lists ruled out IRAS sources associated with HII regions, hot stars, etc ...

We show that the sample of IRAS AGB stars in the Magellanic Clouds is very incomplete. Only AGB stars more luminous than typically tex2html_wrap_inline1552 and with a mass-loss rate larger than typically tex2html_wrap_inline1554/yr could be detected by the IRAS satellite. As a consequence, one expects to find very few carbon stars in the IRAS sample. We also expect that most AGB stars with intermediate mass-loss rates have not been discovered yet, neither in optical surveys, nor in the IRAS survey.gif

keywords: circumstellar matter -- stars: late- type -- stars: mass-loss -- stars: AGB and post-AGB -- supergiants

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