Astrometry of Circumstellar Masers

  • H.J van Langevelde
  • W. H. T. Vlemmings
Part of the Astrophysics and Space Science Library book series (ASSL, volume 283)

Abstract

The circumstellar masers around evolved stars offer an interesting possibility to measure stellar parameters through VLBI astrometry. In this paper the application of this technique is discussed, including the accuracy and the uncertainties of the method. The different maser species (OH, H2O, SiO) have slightly different characteristics and applications. This paper does not concern astrometry of maser spots to study the kinematics of the envelope, but concentrates on attempting to measure the motion of the underlying star

Keywords

masers stars: circumstellar matter techniques: interferometric techniques: astrometry 

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Copyright information

© Springer Science+Business Media Dordrecht 2003

Authors and Affiliations

  • H.J van Langevelde
    • 1
  • W. H. T. Vlemmings
    • 2
  1. 1.Joint Institute for VLBI in EuropeDwingelooThe Netherlands
  2. 2.Sterrewacht LeidenLeidenThe Netherlands

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