Spatial and velocity structure of circumstellar water masers

Details Spatial and velocity structure of circumstellar water masers Spatial and velocity structure of circumstellar water masers

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999newar..43..581c&link_type=abstract

New Astronomy Reviews, Volume 43, Issue 8-10, p. 581-585.

Astronomy and Astrophysics

Astronomy

Scientific paper

We discuss the results of our study of water masers at 22 GHz with the Very Large Array. We conclude, from the anticorrelation between the intensity and linewidth of the maser features, that they are unsaturated; turbulence must exist in order to explain the large observed opacities. For most sources, we are able to place the masers on an expanding shell around the central star, finding that the overall sizes of the maser regions increase with mass loss rate. We compare the extent of the water maser emitting region with the region of dust formation.

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