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SiO and H2O maser emission in OH/IR objects and late-type variable starsA four-year search for 86-GHz SiO and H2O maser emission towards about 20 unidentified OH/IR objects and about 35 optically identified variable stars has yielded information on the temporal variations of many of these sources. The SiO maser emission is noted to behave differently in OH/IR objects as compared with Mira variables. An attempt is made to explain the appearance of strong masers in both vibrational states solely at the 43 GHz transition, under the assumption that an intrinsically weak pump mechanism generates weak (v=1, J=2-1) emission.
Document ID
19860057409
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Nyman, L.-A.
(NASA Goddard Institute for Space Studies New York; Onsala Rymdobservatorium, Sweden)
Johansson, L. E. B.
(NASA Goddard Inst. for Space Studies New York, NY, United States)
Booth, R. S.
(Onsala Rymdobservatorium Sweden)
Date Acquired
August 12, 2013
Publication Date
May 1, 1986
Publication Information
Publication: Astronomy and Astrophysics
Volume: 160
Issue: 2, Ma
ISSN: 0004-6361
Subject Category
Astrophysics
Accession Number
86A42147
Distribution Limits
Public
Copyright
Other

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