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Relationship of OH and H2O Masers

Published online by Cambridge University Press:  04 August 2017

J. R. Forster  and
J. L. Caswell
J. R. Forster
Affiliation:
Division of Radiophysics, CSIRO, PO Box 76 Epping NSW 2121, Australia
J. L. Caswell
Affiliation:
Division of Radiophysics, CSIRO, PO Box 76 Epping NSW 2121, Australia

Abstract

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Detailed maps of 70 OH and H2O masers associated with star-forming regions have been made with the VLA at an angular resolution of ∼2″ arc. The absolute position accuracy is 0″.5 for both the OH and H2O observations, and the relative position accuracy of maser spots within a group is 0″.1 for each species. For about half of the sources compact H II regions are detected at 22 GHz with 0″.1 positional accuracy relative to the strongest H2O maser. Preliminary results are presented, with emphasis on the spatial relationship between the OH and H2O masers and compact H II regions.

Type
I. Star Forming Processes in the Solar Neighborhood
Information
Symposium - International Astronomical Union , Volume 115: Star Forming Regions , 1987 , pp. 174 - 175
Copyright
Copyright © Reidel 1987