Ground-based observations of IRAS candidates for late asymptotic giant branch stars

Astronomy and Astrophysics – Astronomy

Scientific paper

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Asymptotic Giant Branch Stars, Giant Stars, Infrared Astronomy Satellite, Late Stars, Stellar Evolution, Astronomical Photometry, Hydroxyl Radicals, Infrared Stars, Planetary Nebulae

Scientific paper

Ground-based infrared photometric observations were obtained for 16 of the IRAS Circular No. 9 sources which have been suggested to be candidates of OH/IR stars. Five of these sources are confirmed to be OH/IR stars and three others as carbon stars. Two are young objects in an early stage of star formation and one, possibly two, are planetary nebulae. Two sources of very low color temperatures (≡180K) are also found, which may represent objects in transition between the asymptotic giant branch and planetary nebula phases.

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