Proc. IAU volume 13, issue S336, P381-384 2017 DOI: 10.1017/s1743921317009826 View full text
Sandra Etoka, Dieter Engels, Eric Gérard, Anita M. S. Richards

Abstract: Variable OH/IR stars are Asymptotic Giant Branch (AGB) stars with an optically thick circumstellar envelope that emit strong OH 1612 MHz emission. They are commonly observed throughout the Galaxy but also in the LMC and SMC. Hence, the precise inference of the distances of these stars will ultimately result in better constraints on their mass range in different metallicity environments. Through a multi-year long-term monitoring program at the Nancay Radio telescope (NRT) and a complementary high-sensitivity m…

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