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Methanol Masers—Are They in Circumstellar Disks?

  • R. P. Norris (a1), C. J. Phillips (a2) and S. P. Ellingsen (a2)

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 ɪɪ region. Here I describe recent work to investigate the hypothesis that these lines represent edge-on circumstellar disks.

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References

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Batrla, W., et al. 1987. Nature, 326, 4951.
Menten, K.M., 1991. ApJ, 380, L7578.
Norris, R.P., et al. 1993. ApJ, 412, 222232.

Methanol Masers—Are They in Circumstellar Disks?

  • R. P. Norris (a1), C. J. Phillips (a2) and S. P. Ellingsen (a2)

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