Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....92..627d&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 92, Sept. 1986, p. 627-632.
Astronomy and Astrophysics
Astronomy
17
Hydroxyl Emission, Interstellar Masers, Mira Variables, Semiregular Variable Stars, Stellar Spectrophotometry, Far Infrared Radiation, Line Spectra, Silicon Oxides
Scientific paper
The authors have made a systematic search in all four OH lines for maser emission from the short-period Mira variables and the known short-period semiregular maser stars. R Ceti was detected in the main lines, the first short-period (166 days) Mira ever found in OH. None of the short-period Miras searched showed water emission. The authors also present spectra of three SiO detections made in a very limited sample of the short-period Mira variables. Six new OH lines were detected in the semiregular variables; all are Type I stars devoid of any satellite line emission. Both classes of star are weak OH emitters and there is a relative lack of circumstellar material as evidenced by the modest infrared excess shown in the 2.2 - 11 μ color index. These facts are probably related and lend support to the idea that far-infrared radiation is the primary OH maser pump in these stars.
Benson Priscilla J.
Dickinson Dale F.
Jewell Phil R.
Turner Barry E.
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