A&A Supplement series, Vol. 121, January 1997, 45 - 55
Received January 5; accepted May 9, 1996
K.V.K. Iyengar - M. Parthasarathy
Send offprint request: K.V.K. Iyengar
Indian Institute of Astrophysics, Bangalore 560 034, India
We selected 33 unidentified IRAS sources based on the following criteria:
i) galactic latitude more than ,
ii) have flux density higher than 1 Jy
at 12 microns, iii) have good fluxes at 12, 25, and 60 microns with flux
quality factor = 3, iv) and are in the declination zone between and .
We identified the optical counterparts of these sources on the POSS,
ESO, and SERC sky survey prints. Out of the 33 sources studied by us, 30
have optical counterparts which are stellar in appearance.
We have also made BVRI CCD photometry
of the optical counterparts of these sources. The IRAS colours and optical
photometry suggests that IRAS 00408+5933, 02408+5458, 04101+3103,
04278+2253, 04296+3429, 04386+5722, 05089+0459,
06403-0138, 07430+1115, 08005-2356, 09032-3953,
09370-4826, and 14429-4539
are most likely late type post-AGB stars with cold detached circumstellar
envelopes and the rest are most likely AGB stars with dust shells.
keywords: stars: AGB, post-AGB - stars: evolution -- stars: circumstellar matter -- infrared: stars