1998International Astronomical Union ColloquiumOpen access

Proper Motions of Water Masers in Circumstellar Shells

Kevin B. Marvel, P. J. Diamond, A. J. Kemball

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Abstract

Abstract We present measurements of proper motions for circumstellar water maser observations obtained with the VLBA. Results of the observations and modeling indicate that the water masers exist in a kinematically complex region of the circumstellar envelope. A change in position of the maser spots as a function of velocity is discussed.

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Abstract We present measurements of proper motions for circumstellar water maser observations obtained with the VLBA. Results of the observations and modeling indicate that the water masers exist in a kinematically complex region of the circumstellar envelope. A change in position of the maser spots as a function of velocity is discussed.

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Available abstract

Abstract We present measurements of proper motions for circumstellar water maser observations obtained with the VLBA. Results of the observations and modeling indicate that the water masers exist in a kinematically complex region of the circumstellar envelope. A change in position of the maser spots as a function of velocity is discussed.

Key concepts: Maser, Circumstellar envelope, Envelope (radar), Physics, Circumstellar disk, Astrophysics, Position (finance), Astronomy

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