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The discrete nature of circumstellar OH maser emission

Journal Article · · Astronomical Journal; (USA)
DOI:https://doi.org/10.1086/115329· OSTI ID:6863320
The Arecibo radio telescope was used to obtain high-resolution, high-SNR 1612-MHz observations of seven circumstellar OH maser sources. Each spectrum displays the double-peaked emission line profile characteristics of an expanding shell. The jaggedness of the spectra, which varies from source to source, is consistent with statistical fluctuations in the number of discrete emitting elements contributing at a given velocity. In particular, it is found that the spectra of WX Psc and OH 53.6-0.2 contain narrow, weak, isolated emission features which may arise from individual emitting elements. 14 refs.
OSTI ID:
6863320
Journal Information:
Astronomical Journal; (USA), Journal Name: Astronomical Journal; (USA) Vol. 99; ISSN 0004-6256; ISSN ANJOA
Country of Publication:
United States
Language:
English