OH masers in short-period Mira and semiregular variable stars

Abstract

view Abstract Citations (17) References (21) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS OH masers in short-period Mira and semiregular variable stars. Dickinson, D. F. ; Turner, B. E. ; Jewell, P. R. ; Benson, P. J. Abstract 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. Publication: The Astronomical Journal Pub Date: September 1986 DOI: 10.1086/114193 Bibcode: 1986AJ.....92..627D Keywords: Hydroxyl Emission; Interstellar Masers; Mira Variables; Semiregular Variable Stars; Stellar Spectrophotometry; Far Infrared Radiation; Line Spectra; Silicon Oxides; Astrophysics full text sources ADS | data products SIMBAD (102)