VLBI observations of the H2O supermaser outburst in the orion nebula

  • L. I. Matveyenko
  • P. J. Diamond
  • D. A. Graham
  • W. Junor
7. Water Masers in Star-Forming Regions
Part of the Lecture Notes in Physics book series (LNP, volume 412)


We have conducted a campaign of annual VLBI observations of the H2O supermaser region in the Orion-KL. Most of our observations have been conducted with a small number (≈ 3) of antennas. Here we report on a 7 station observation taken in 1985. We have produced an image of the supermaser region. Our data indicate that the masers lie along an approximately E-W line, and that there is a significant velocity gradient across the maser region. We suggest that the masers originate in several thin rings in a rotating, expanding disc of gas and dust.


Flux Density Optical Depth Position Angle Compact Component VLBI Observation 
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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • L. I. Matveyenko
    • 1
  • P. J. Diamond
    • 2
  • D. A. Graham
    • 3
  • W. Junor
    • 4
  1. 1.Institute for Space ResearchMoscowRussia
  2. 2.NRAOSocorroUSA
  3. 3.MPHR, Auf Dem HügelBonnGermany
  4. 4.NRAOSocorroUSA

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