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Paper: Methanol Masers -- Are They in Circumstellar Disks?
Volume: 144, Radio Emission from Galactic and Extragalactic Compact Sources, IAU Colloquium 164
Page: 377
Authors: Norris, R. P.; Phillips, C. J.; Ellingsen, S. P.
Abstract: Since the discovery of the 12.2 and 6.7 GHz methanol maser lines, these masers have been studied in great detail. Even in the earliest studies, it appeared that in some fraction of the sources, the maser spots were arranged in lines. This contrasts with the well-studied OH and water masers, in which the masers tended to be clustered almost randomly around a compact H ii region. Here I describe recent work to investigate the hypothesis that these lines represent edge-on circumstellar disks.
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