Abstract
High resolution observations of the 1612 and 1667 MHz OH masers in AFGL 2343, a GIa star which is likely a proto-planetary nebula, are presented. Comparison between the OH observations, and recently published SiO and CO observations, as well as modelling of the infrared spectral distribution, suggest that the OH and SiO emission regions may be interior to the cold dust and CO emission regions; a conclusion that may be reached is that the OH and SiO are indicators of a more recent, less massive mass loss epsiode than that which produced the CO and cold dust outflow.
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© 1993 Springer-Verlag
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Claussen, M.J. (1993). OH masers in the circumstellar shell of the GIa supergiant AFGL 2343. In: Clegg, A.W., Nedoluha, G.E. (eds) Astrophysical Masers. Lecture Notes in Physics, vol 412. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-56343-1_277
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DOI: https://doi.org/10.1007/3-540-56343-1_277
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Publisher Name: Springer, Berlin, Heidelberg
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Online ISBN: 978-3-540-47536-1
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