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Proper Motions of Water Masers in Circumstellar Shells

Published online by Cambridge University Press:  12 April 2016

K. B. Marvel ,
P. J. Diamond  and
A. J. Kemball
K. B. Marvel
Affiliation:
Caltech-OVRO, Mail Code 105-24, Pasadena, CA 91125, U.S.A.
P. J. Diamond
Affiliation:
National Radio Astronomy Observatory, Socorro, NM, U.S.A.
A. J. Kemball
Affiliation:
National Radio Astronomy Observatory, Socorro, NM, U.S.A.

Abstract

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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.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 164: Radio Emission from Galactic and Extragalactic Compact Sources , 1998 , pp. 253 - 254
Copyright
Copyright © Astronomical Society of the Pacific 1998

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