Abstract
The OH maser emission from OH/IR stars shows structure on an arc second scale, and is therefore ideally suited to observation by the new Jodrell Bank Multi Element Radio Linked Interferometer Network (MERLIN)1 operating in the spectral line mode2. Here we present MERLIN observations of two OH/IR stars: OH127.8–0.0 and OH104.9+2.4. The spatial structure of OH127.8–0.0 revealed by Booth et al.3 using three single base line interferometers was consistent with a simple expanding shell model. Our maps of OH127.8–0.0 confirm this interpretation, whereas the circumstellar shell that we find around OH104.9+2.4 exhibits a more complex motion, which we interpret in terms of rotation.
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Norris, R., Diamond, P. & Booth, R. MERLIN spectral line observations of circumstellar shells around two OH/IR stars. Nature 299, 131–134 (1982). https://doi.org/10.1038/299131a0
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DOI: https://doi.org/10.1038/299131a0
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