A. Strack, E. D. Araya, M. E. Lebrón, R. F. Minchin, H. G. Arce, T. Ghosh, P. Hofner, S. Kurtz, L. Olmi, Y. Pihlström, C. J. Salter
Abstract:AbstractThe final stages of low-mass stellar evolution are characterized by significant mass loss due to stellar pulsations during the AGB phase, which lead to the development of planetary nebulae. Molecular masers of H2O, SiO, and ground state OH transitions are commonly detected in oxygen-rich late-type stars (OH/IR objects). In contrast, excited OH maser transitions are rare. We discuss our study of the carbon-rich pre-planetary nebula CRL618 (a prototypical post-AGB star). Observations conducted in May 200…
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